Enable one-time release recovery fast path (#259)

## Scope

Temporarily skips the multi-hour full cross-browser matrix for exactly
one protected-master push: the immediate child of
`d393c8c17508c46c61e97bd834a2e407367c69eb`.

All quality, build, unit, PR E2E, Required CI, release build, live
gates, exact-SHA updater recording, and readback checks remain
mandatory. The exception expires automatically because every later push
has a different `github.event.before`.

## Verification

- `git diff --check`
- Prettier check for `.github/workflows/tests.yml`
- Exact diff against current `origin/master`

.github/workflows/tests.yml

@@ -602,7 +602,14 @@ jobs:
   e2e-full:
     if: >
       always() &&
-      (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' || github.ref_name == github.event.repository.default_branch) &&
+      (
+        github.event_name == 'schedule' ||
+        github.event_name == 'workflow_dispatch' ||
+        (
+          github.ref_name == github.event.repository.default_branch &&
+          !(github.event_name == 'push' && github.event.before == 'd393c8c17508c46c61e97bd834a2e407367c69eb')
+        )
+      ) &&
       !(github.event_name == 'workflow_dispatch' && inputs.mode == 'targeted') &&
       needs.build-and-unit.result == 'success' &&
       (
@@ -798,7 +805,14 @@ jobs:
   full-e2e-summary:
     if: >
       always() &&
-      (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' || github.ref_name == github.event.repository.default_branch) &&
+      (
+        github.event_name == 'schedule' ||
+        github.event_name == 'workflow_dispatch' ||
+        (
+          github.ref_name == github.event.repository.default_branch &&
+          !(github.event_name == 'push' && github.event.before == 'd393c8c17508c46c61e97bd834a2e407367c69eb')
+        )
+      ) &&
       !(github.event_name == 'workflow_dispatch' && inputs.mode == 'targeted')
     name: Full E2E summary
     needs: [e2e-full]