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.

test.js

@@ -71,20 +71,6 @@ async function runTest(test) {
     failed++;
   }
 }
-    const data = await res.json();
-
-    if (data.success === true && data.results) {
-      console.log(`✅ ${test.name}`);
-      passed++;
-    } else {
-      console.log(`❌ ${test.name} - Invalid response format`);
-      failed++;
-    }
-  } catch (error) {
-    console.log(`❌ ${test.name} - ${error.message}`);
-    failed++;
-  }
-}
 
 async function runAll() {
   console.log(`\n🧪 Running ${tests.length} tests...\n`);