Fix: Resume upload endpoint /api/v1/resumes/upload returning 404

[adityasingh-0803]

Problem:
The frontend upload call failed with a 404 because the backend route /api/v1/resumes/upload was missing or mismatched.

Solution:

Implemented the /api/v1/resumes/upload endpoint in the FastAPI backend.

Validates uploaded files (only PDF, DOC, DOCX; max 5 MB).

Saves uploaded files to /tmp/resumes/ (can be modified to permanent storage).

Updated frontend API call to match the backend route.

Added backend tests to verify valid and invalid uploads.

Added UI error handling for upload failures.

Benefits:

Resume upload now works end-to-end.

Users receive clear feedback if the file is invalid.

Makes Resume-Matcher fully functional for testing new resumes.

under hacktoberfest 2025 please assign

[dhruvilacharya]

Hey @adityasingh-0803,
I saw your fix for the resume upload endpoint (issue #511) - great work identifying and solving the 404 issue!
I'd like to help contribute to this fix. Would you mind if I submit a PR to collaborate on this? I can help with:

Reviewing and testing the endpoint implementation
Adding additional edge case handling if needed
Or any other aspect you'd like assistance with

Let me know if you're open to collaboration on this, or if you'd prefer to handle it solo. Either way, happy to support however works best for you!
Thanks!

[adityasingh-0803]

it works but need assign on the issue