feat(ci): add gate job for stable branch protection status check

Adds a "gate" job that runs after all other CI jobs complete successfully
to provide a stable "test / Test" status check for branch protection.

Issue: BTC-2915

Co-authored-by: llm-git <llm-git@ttll.de>

Author: OttoAllmendinger

.github/workflows/build-and-test.yaml

@@ -201,3 +201,12 @@ jobs:
             packages/wasm-utxo/pkg/
             packages/wasm-utxo/dist/
           retention-days: 1
+
+  # This job provides a stable "test / Test" status check for branch protection.
+  # It runs after all other jobs complete successfully.
+  gate:
+    name: "Test"
+    needs: [build, test, finalize]
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "All checks passed"

.github/workflows/status-check.yaml

@@ -22,4 +22,3 @@ jobs:
             exit 1
           fi
           echo "Build and Test workflow succeeded"
-