feat: Implement throttling and retry logic in secure-fs module

- Added concurrency limiting using p-limit to prevent ENFILE/EMFILE errors.
- Introduced retry logic with exponential backoff for transient file descriptor errors.
- Enhanced secure-fs with new functions for configuring throttling and monitoring active/pending operations.
- Added unit tests for throttling and retry logic to ensure reliability.

apps/server/src/lib/secure-fs.ts

@@ -20,4 +20,9 @@ export const {
   lstat,
   joinPath,
   resolvePath,
+  // Throttling configuration and monitoring
+  configureThrottling,
+  getThrottlingConfig,
+  getPendingOperations,
+  getActiveOperations,
 } = secureFs;