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/docker-build.yml

@@ -22,8 +22,6 @@ name: Docker Build, Publish & Test
 
 on:
   workflow_dispatch:
-  pull_request:
-  push:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event_name == 'workflow_run' && github.event.workflow_run.head_branch || github.head_ref || github.ref_name }}