chore: repoint registry.breakpilot.com -> repo.breakpilot.com (Harbor)

Consolidate the platform on Harbor (repo.breakpilot.com/breakpilot/*), the
authoritative registry. registry.breakpilot.com (never-built stage registry) is
retired. NOTE: verify REGISTRY_USER/REGISTRY_PASS hold valid Harbor push creds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/ci.yaml

@@ -104,18 +104,18 @@ jobs:
       - uses: actions/checkout@v4
       - uses: docker/login-action@v3
         with:
-          registry: registry.breakpilot.com
+          registry: repo.breakpilot.com
           username: ${{ secrets.REGISTRY_USER }}
           password: ${{ secrets.REGISTRY_PASS }}
       - uses: docker/build-push-action@v6
         with:
           push: true
           tags: |
-            registry.breakpilot.com/${{ github.event.repository.name }}:sha-${{ github.sha }}
-            registry.breakpilot.com/${{ github.event.repository.name }}:env-stage
+            repo.breakpilot.com/breakpilot/${{ github.event.repository.name }}:sha-${{ github.sha }}
+            repo.breakpilot.com/breakpilot/${{ github.event.repository.name }}:env-stage
       - uses: anchore/sbom-action@v0
         with:
-          image: registry.breakpilot.com/${{ github.event.repository.name }}:sha-${{ github.sha }}
+          image: repo.breakpilot.com/breakpilot/${{ github.event.repository.name }}:sha-${{ github.sha }}
       - run: orca apply --env=stage --image-tag=sha-${{ github.sha }}
         env:
           ORCA_TOKEN: ${{ secrets.ORCA_STAGE_TOKEN }}