Feat(feature) File Upload

[ykargeee-bit]

Closes #111

Description

Adds a complete file upload and storage system with support for local storage, Amazon S3, and Azure Blob Storage.

The feature includes:

• File upload endpoints
• File metadata and validation
• Configurable upload size limits
• Local, S3, and Azure Blob storage backends
• File scanning support
• File cleanup and retention policies
• File expiration handling
• Storage encryption configuration
• File upload database entities
• Application-wide module and environment integration
• Unit tests for validation, scanning, and storage backends

This provides a flexible and configurable foundation for securely uploading, storing, scanning, and managing files across different storage providers.

Fixes #111

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Performance improvement
• Code refactoring

How Has This Been Tested?

• Unit tests added/updated
• E2E tests added/updated
• Manual testing performed
• Tested in staging environment

Validation performed locally:

• npm run build:tsc
• npm test -- src/infrastructure/file-upload
• 5 test suites passed
• 62 tests passed

Tests cover file validation, file scanning, local storage, S3 storage, and Azure Blob storage behavior.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new build errors
• I have added tests that prove my feature works
• New and existing relevant unit tests pass locally
• Any dependent changes have been merged and published in downstream modules

Screenshots

Not applicable.

Additional Notes

The storage backend is selected through environment configuration:

• local
• s3
• azure_blob

Cloud SDKs are loaded dynamically, allowing local development without requiring cloud provider packages to be active.