feat(FN-1354): add auto-summarize task titles feature

- Add /api/ai/summarize-title endpoint for AI-generated task titles
- Integrate title summarization into task creation flow when autoSummarizeTitles is enabled
- Add debug logging and error checking to summarizeTitle in ai-summarize.ts
- Add error logging to route handler and task store for failed summaries
- Add comprehensive integration tests for the summarize-title API endpoint
- Add memory entry documenting the auto-summarize titles bug fix

packages/core/src/store.ts

@@ -1048,7 +1048,12 @@ export class TaskStore extends EventEmitter<TaskStoreEvents> {
         }
       } catch (err) {
         // Log warning but don't block task creation
-        console.warn(`[TaskStore] Title summarization failed for task ${id}:`, err instanceof Error ? err.message : err);
+        const errorMsg = err instanceof Error ? err.message : String(err);
+        const autoEnabled = options?.settings?.autoSummarizeTitles === true;
+        console.warn(
+          `[TaskStore] Title summarization failed for task ${id}: ${errorMsg}` +
+          ` (desc length: ${input.description.length}, auto-summarize: ${autoEnabled})`
+        );
       }
     }