fix: make gates transparent about fork PR skip behavior

- Remove `if: always()` from integration-gate, coverage-gate, codecov-gate, pipeline-gate
- Gates now naturally skip when their upstream dependencies are skipped (fork PR behavior)
- Prevents confusing "complete" status when nothing actually ran
- Fork PRs will show "skipped" in UI instead of obscuring behavior behind gate success
- Aligns with GitHub Actions standard job dependency semantics

.github/workflows/auto-add-to-project.yml

@@ -3,8 +3,6 @@ name: Auto-add issues and PRs to Project
 on:
   issues:
     types: [opened, reopened]
-  pull_request:
-    types: [opened, reopened]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.issue.number || github.event.pull_request.number }}