handlers-postgres-integration.yml: add internal# tracker to Phase 3 comments

The lint-continue-on-error-tracking linter (Tier 2e, internal#350)
requires a `# mc#NNN` or `# internal#NNN` tracker comment within ±2
lines of every `continue-on-error: true` directive. The Phase 3
comments previously read "RFC #219 §1" — the bare `#219` doesn't
match the linter's tracker pattern which requires `mc#` or
`internal#` as the slug prefix.

Fix: change both Phase 3 comments to "RFC internal#219 §1". The
reference is already validated in other workflows (e.g.
lint-pre-flip-continue-on-error.yml line 100). internal#219 is open
and 2 days old, well within the 14-day tracker cap.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/handlers-postgres-integration.yml

@@ -78,7 +78,7 @@ jobs:
   detect-changes:
     name: detect-changes
     runs-on: ubuntu-latest
-    # Phase 3 (RFC #219 §1): surface broken workflows without blocking.
+    # Phase 3 (RFC internal#219 §1): surface broken workflows without blocking.
     continue-on-error: true
     outputs:
       handlers: ${{ steps.filter.outputs.handlers }}
@@ -118,7 +118,7 @@ jobs:
     name: Handlers Postgres Integration
     needs: detect-changes
     runs-on: ubuntu-latest
-    # Phase 3 (RFC #219 §1): surface broken workflows without blocking.
+    # Phase 3 (RFC internal#219 §1): surface broken workflows without blocking.
     continue-on-error: true
     env:
       # Unique name per run so concurrent jobs don't collide on the