Fix PR duplicate check not running on external contributor submissions (#2188)

* Initial plan

* Fix PR duplicate check not running on external contributor submissions

Add forks: [\"*\"] and roles: all to pr-duplicate-check.md so the
agentic workflow runs for all PR authors, including external contributors
submitting from forks. Previously, the generated lock.yml contained:
- A fork repository check blocking all fork PRs from running
- A team membership check (admin/maintainer/write) blocking external contributors

Recompiled with gh aw compile to regenerate pr-duplicate-check.lock.yml.
The pre_activation job (which held the membership gate) is now removed,
and the activation job runs unconditionally for all pull_request events.

Closes #2121

Co-authored-by: aaronpowell <434140+aaronpowell@users.noreply.github.com>

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* fixing a bunch of warnings on all the agentic workflows

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: aaronpowell <434140+aaronpowell@users.noreply.github.com>
Co-authored-by: Aaron Powell <me@aaron-powell.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

.github/workflows/learning-hub-updater.md

@@ -6,6 +6,7 @@ on:
   workflow_dispatch:
 permissions:
   contents: read
+  copilot-requests: write
 tools:
   bash: ["curl", "gh"]
   edit:
@@ -85,4 +86,4 @@ Create a pull request with your changes, using the `main` branch as the base bra
 2. What sections of the guide were updated
 3. Links to the source announcements
 
-The PR should target the `main` branch and include the labels `automated-update` and `copilot-updates`.
+The PR should target the `main` branch and include the labels `automated-update` and `copilot-updates`.