fix: address PR review issues for auto-mode refactor

- agent-executor: move executeQuery into try block for proper heartbeat cleanup,
  re-parse tasks when edited plan is approved
- auto-loop-coordinator: handle feature execution failures with proper logging
  and failure tracking, support backward-compatible method signatures
- facade: delegate getActiveAutoLoopProjects/Worktrees to coordinator,
  always create own AutoLoopCoordinator (not shared), pass projectPath
  to approval methods and branchName to failure tracking
- global-service: document shared autoLoopCoordinator is for monitoring only
- execution-types: fix ExecuteFeatureFn type to match implementation
- feature-state-manager: use readJsonWithRecovery for loadFeature
- pipeline-orchestrator: add defensive null check and try/catch for
  merge response parsing
- plan-approval-service: use project-scoped keys to prevent cross-project
  collisions, maintain backward compatibility for featureId-only lookups

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/server/src/services/auto-mode/global-service.ts

@@ -51,15 +51,19 @@ export class GlobalAutoModeService {
     this.featureStateManager = new FeatureStateManager(events, featureLoader);
 
     // Create AutoLoopCoordinator with callbacks
-    // These callbacks use placeholders since GlobalAutoModeService doesn't execute features
-    // Feature execution is done via facades
+    // IMPORTANT: This coordinator is for MONITORING ONLY (getActiveProjects, getActiveWorktrees).
+    // Facades MUST create their own AutoLoopCoordinator for actual execution.
+    // The executeFeatureFn here is a safety guard - it should never be called.
     this.autoLoopCoordinator = new AutoLoopCoordinator(
       this.eventBus,
       this.concurrencyManager,
       settingsService,
-      // executeFeatureFn - not used by global service, routes handle execution
+      // executeFeatureFn - throws because facades must use their own coordinator for execution
       async () => {
-        throw new Error('executeFeatureFn not available in GlobalAutoModeService');
+        throw new Error(
+          'executeFeatureFn not available in GlobalAutoModeService. ' +
+            'Facades must create their own AutoLoopCoordinator for execution.'
+        );
       },
       // getBacklogFeaturesFn
       (pPath, branchName) =>