Fix import.meta.url CJS compatibility

apps/backend/src/services/harvester/PythonHarvesterAdapter.ts

@@ -3,8 +3,11 @@ import path from 'path';
 import { EventEmitter } from 'events';
 import { fileURLToPath } from 'url';
 
-const __dirname = path.dirname(fileURLToPath(import.meta.url));
-const PYTHON_DIR = path.resolve(__dirname, '../../../python');
+// Handle both ESM and CJS contexts (import.meta.url is undefined in bundled CJS)
+const __dirname = typeof import.meta?.url !== 'undefined'
+    ? path.dirname(fileURLToPath(import.meta.url))
+    : process.cwd();
+const PYTHON_DIR = path.resolve(__dirname, 'python');
 
 export interface HarvestResult {
     success: boolean;