Enhance Oracle-to-PostgreSQL migration skills and documentation (#2284)

- Update migration agent guidelines to prioritize extension tool usage for code migration.
- Refine migration phases with detailed steps for pre-migration review and schema migration.
- Add new reviewing skill references for PostgreSQL materialized view refresh and UNION ALL planner risks.
- Ensure consistency in collation handling and testing strategies across skills.

Co-authored-by: TCPrimedPaul <paul.delannoy@tc.gc.ca>

docs/README.skills.md

@@ -249,7 +249,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
 | [microsoft-code-reference](../skills/microsoft-code-reference/SKILL.md)<br />`gh skills install github/awesome-copilot microsoft-code-reference` | Look up Microsoft API references, find working code samples, and verify SDK code is correct. Use when working with Azure SDKs, .NET libraries, or Microsoft APIs—to find the right method, check parameters, get working examples, or troubleshoot errors. Catches hallucinated methods, wrong signatures, and deprecated patterns by querying official docs. | None |
 | [microsoft-docs](../skills/microsoft-docs/SKILL.md)<br />`gh skills install github/awesome-copilot microsoft-docs` | Query official Microsoft documentation to find concepts, tutorials, and code examples across Azure, .NET, Agent Framework, Aspire, VS Code, GitHub, and more. Uses Microsoft Learn MCP as the default, with Context7 and Aspire MCP for content that lives outside learn.microsoft.com. | None |
 | [microsoft-skill-creator](../skills/microsoft-skill-creator/SKILL.md)<br />`gh skills install github/awesome-copilot microsoft-skill-creator` | Create agent skills for Microsoft technologies using Learn MCP tools. Use when users want to create a skill that teaches agents about any Microsoft technology, library, framework, or service (Azure, .NET, M365, VS Code, Bicep, etc.). Investigates topics deeply, then generates a hybrid skill storing essential knowledge locally while enabling dynamic deeper investigation. | `references/skill-templates.md` |
-| [migrating-oracle-to-postgres-stored-procedures](../skills/migrating-oracle-to-postgres-stored-procedures/SKILL.md)<br />`gh skills install github/awesome-copilot migrating-oracle-to-postgres-stored-procedures` | Migrates Oracle PL/SQL stored procedures to PostgreSQL PL/pgSQL. Translates Oracle-specific syntax, preserves method signatures and type-anchored parameters, leverages orafce where appropriate, and applies COLLATE "C" for Oracle-compatible text sorting. Use when converting Oracle stored procedures or functions to PostgreSQL equivalents during a database migration. | None |
+| [migrating-oracle-to-postgres-stored-procedures](../skills/migrating-oracle-to-postgres-stored-procedures/SKILL.md)<br />`gh skills install github/awesome-copilot migrating-oracle-to-postgres-stored-procedures` | Migrates Oracle PL/SQL stored procedures to PostgreSQL PL/pgSQL. Translates Oracle-specific syntax, preserves method signatures and type-anchored parameters, leverages orafce where appropriate, and applies explicit collation mapping (`COLLATE "C"` only when appropriate, locale collations when required). Use when converting Oracle stored procedures or functions to PostgreSQL equivalents during a database migration. | None |
 | [minecraft-plugin-development](../skills/minecraft-plugin-development/SKILL.md)<br />`gh skills install github/awesome-copilot minecraft-plugin-development` | Use this skill when building or modifying Minecraft server plugins for Paper, Spigot, or Bukkit, including plugin.yml setup, commands, listeners, schedulers, player state, team or arena systems, persistent progression, economy or profile data, configuration files, Adventure text, and version-safe API usage. Trigger for requests like "build a Minecraft plugin", "add a Paper command", "fix a Bukkit listener", "create plugin.yml", "implement a minigame mechanic", "add a perk or quest system", or "debug server plugin behavior". | `references/bootstrap-registration.md`<br />`references/build-test-and-runtime-validation.md`<br />`references/config-data-and-async.md`<br />`references/maps-heroes-and-feature-modules.md`<br />`references/minigame-instance-flow.md`<br />`references/persistent-progression-and-events.md`<br />`references/project-patterns.md`<br />`references/state-sessions-and-phases.md` |
 | [mini-context-graph](../skills/mini-context-graph/SKILL.md)<br />`gh skills install github/awesome-copilot mini-context-graph` | A persistent, compounding knowledge base combining Karpathy's LLM Wiki pattern<br />with a structured knowledge graph. Ingest documents once — the LLM writes wiki<br />pages, extracts entities/relations into the graph, and stores raw content for<br />evidence retrieval. Knowledge accumulates and cross-references; it is never<br />re-derived from scratch. | `references/ingestion.md`<br />`references/lint.md`<br />`references/ontology.md`<br />`references/retrieval.md`<br />`scripts/config.py`<br />`scripts/contextgraph.py`<br />`scripts/template_agent_workflow.py`<br />`scripts/tools` |
 | [mkdocs-translations](../skills/mkdocs-translations/SKILL.md)<br />`gh skills install github/awesome-copilot mkdocs-translations` | Generate a language translation for a mkdocs documentation stack. | None |
@@ -335,7 +335,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
 | [repo-story-time](../skills/repo-story-time/SKILL.md)<br />`gh skills install github/awesome-copilot repo-story-time` | Generate a comprehensive repository summary and narrative story from commit history | None |
 | [resemble-detect](../skills/resemble-detect/SKILL.md)<br />`gh skills install github/awesome-copilot resemble-detect` | Deepfake detection and media safety — detect AI-generated audio, images, video, and text, trace synthesis sources, apply watermarks, verify speaker identity, and analyze media intelligence using Resemble AI | `LICENSE`<br />`references/api-reference.md` |
 | [review-and-refactor](../skills/review-and-refactor/SKILL.md)<br />`gh skills install github/awesome-copilot review-and-refactor` | Review and refactor code in your project according to defined instructions | None |
-| [reviewing-oracle-to-postgres-migration](../skills/reviewing-oracle-to-postgres-migration/SKILL.md)<br />`gh skills install github/awesome-copilot reviewing-oracle-to-postgres-migration` | Identifies Oracle-to-PostgreSQL migration risks by cross-referencing code against known behavioral differences (empty strings, refcursors, type coercion, sorting, timestamps, concurrent transactions, etc.). Use when planning a database migration, reviewing migration artifacts, or validating that integration tests cover Oracle/PostgreSQL differences. | `references/REFERENCE.md`<br />`references/empty-strings-handling.md`<br />`references/no-data-found-exceptions.md`<br />`references/oracle-parentheses-from-clause.md`<br />`references/oracle-to-postgres-sorting.md`<br />`references/oracle-to-postgres-timestamp-timezone.md`<br />`references/oracle-to-postgres-to-char-numeric.md`<br />`references/oracle-to-postgres-type-coercion.md`<br />`references/postgres-concurrent-transactions.md`<br />`references/postgres-refcursor-handling.md` |
+| [reviewing-oracle-to-postgres-migration](../skills/reviewing-oracle-to-postgres-migration/SKILL.md)<br />`gh skills install github/awesome-copilot reviewing-oracle-to-postgres-migration` | Identifies Oracle-to-PostgreSQL migration risks by cross-referencing code against known behavioral differences (empty strings, refcursors, type coercion, sorting/collations, UNION ALL planner risks, materialized-view refresh requirements, timestamps, concurrent transactions, etc.). Use when planning a database migration, reviewing migration artifacts, or validating that integration tests cover Oracle/PostgreSQL differences. | `references/REFERENCE.md`<br />`references/empty-strings-handling.md`<br />`references/no-data-found-exceptions.md`<br />`references/oracle-parentheses-from-clause.md`<br />`references/oracle-to-postgres-sorting.md`<br />`references/oracle-to-postgres-timestamp-timezone.md`<br />`references/oracle-to-postgres-to-char-numeric.md`<br />`references/oracle-to-postgres-type-coercion.md`<br />`references/postgres-concurrent-transactions.md`<br />`references/postgres-materialized-view-refresh.md`<br />`references/postgres-refcursor-handling.md`<br />`references/postgres-union-all-planner.md` |
 | [rhino3d-scripts](../skills/rhino3d-scripts/SKILL.md)<br />`gh skills install github/awesome-copilot rhino3d-scripts` | Authoring and debugging scripts for Rhinoceros 3D (Rhino 8 and later). Use when asked to write RhinoScript (VBScript / .rvb / .vbs), RhinoPython, or RhinoCommon-based scripts; automate Rhino modeling tasks; build command macros; manipulate Rhino geometry, layers, blocks, or document objects; pick objects from the viewport; control redraw and undo; or load and run scripts from the Rhino Script Editor. Covers `rhinoscriptsyntax`, `scriptcontext`, the `Rhino.*` RhinoCommon namespaces (`Rhino.Geometry`, `Rhino.DocObjects`, `Rhino.Input`, `Rhino.UI`, `Rhino.Display`, `Rhino.FileIO`), and the Rhino 8 unified Script Editor. | `references/macros-and-loading.md`<br />`references/rhinocommon-map.md`<br />`references/rhinoscriptsyntax-cheatsheet.md`<br />`references/vbscript-quirks.md` |
 | [roundup](../skills/roundup/SKILL.md)<br />`gh skills install github/awesome-copilot roundup` | Generate personalized status briefings on demand. Pulls from your configured data sources (GitHub, email, Teams, Slack, and more), synthesizes across them, and drafts updates in your own communication style for any audience you define. | None |
 | [roundup-setup](../skills/roundup-setup/SKILL.md)<br />`gh skills install github/awesome-copilot roundup-setup` | Interactive onboarding that learns your communication style, audiences, and data sources to configure personalized status briefings. Paste in examples of updates you already write, answer a few questions, and roundup calibrates itself to your workflow. | `references/config-template.md` |