v1.9.1: Fix 4 critical bugs from sed operations

- apiRoutes.js: Moved imports outside comment block (caused 500 on all endpoints)
- test.js: Deleted orphaned duplicate code after function close
- random.controller.js: Removed stray closing brace breaking try/catch
- cache.helper.js: Added missing MAX_CACHE_SIZE constant

These bugs were introduced by sed insert commands placing code in wrong positions.
The API was returning 500 FUNCTION_INVOCATION_FAILED on all endpoints.

src/helper/cache.helper.js

@@ -40,6 +40,8 @@ const cache = new Map();
  * @default 300000
  */
 const CACHE_TTL = 5 * 60 * 1000;
+// ---- FEATURE: Maximum cache size ----
+const MAX_CACHE_SIZE = 100;
 
 // ══════════════════════════════════════════════════════════════
 // CACHE OPERATIONS