Cleanup Script for IPFS Storage to Remove Invalid Vote Rationale Files

### Description
Implement a script that scans files stored on GovTool’s dedicated IPFS storage. The script should identify files that do not follow the expected vote rationale format and delete them. This helps maintain clean and relevant IPFS content.
Reusing the same IPFS storage by other Cardano governance tools is currently acceptable and encouraged, until rate-limiting measures are in place.

### Acceptance Criteria
- [ ] A script exists that iterates through all files on GovTool’s IPFS storage.
- [ ] Files not matching the expected vote rationale format are automatically deleted.
- [ ] The script runs periodically or can be triggered manually.
- [ ] Logs or reports are generated to track which files were deleted.