Record CI cache mitigation results and ignore runner logs

- Mark cache-timeout fix verified (run 1090: zero CacheService lines,
  54/54 tests, job succeeded)
- Ignore .gitea/logs/ (runner writes logs into the checkout)
- Leave collaborator's radio-easter-egg changes in the working tree
  (strings.en.json, game_manager.gd) uncommitted for review

.gitignore

@@ -15,3 +15,5 @@ Thumbs.db
 # Logs and temp
 *.log
 user://
+# CI runner workflow logs (written into the checkout by the Gitea runner)
+.gitea/logs/