[BUG] API crashes on import due to eager commonforms dependency loading

[lil-aditya]

Bug

Importing the backend module (import api.main) can crash Python in certain environments.

This happens because:

• file_manipulator.py imports commonforms at import-time
• commonforms pulls heavy dependencies (ultralytics → cv2 → numpy)
• These dependencies may fail due to missing native libraries or incompatible environments

As a result, the API fails to start even if template functionality is never used.

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Steps to Reproduce

1. Clone the repository
2. Set up a minimal Python environment without full CV dependencies
3. Run:

   import api.main