Add two new MCP servers:
**Databases:**
- JaviMaligno/postgres_mcp - PostgreSQL MCP server with 14 tools for querying, schema exploration, and table analysis. Features security-first design with SQL injection prevention and read-only by default.
**Version Control:**
- JaviMaligno/mcp-server-bitbucket - Bitbucket MCP server with 58 tools for repository management, PRs, pipelines, branches, commits, deployments, webhooks, tags, branch restrictions, and source browsing.