Remove file extensions from import statements

Updated import statements across several server files to omit explicit file extensions. This improves compatibility with module resolution and aligns with common import practices.

src/server/services/githubJsonService.js

@@ -1,6 +1,6 @@
 // JavaScript wrapper for githubJsonService.ts
 // This allows the JavaScript autoSyncService.js to import the TypeScript service
 
-import { githubJsonService } from './githubJsonService.ts';
+import { githubJsonService } from './githubJsonService';
 
 export { githubJsonService };