向宁 3a18ca0579 feat: add directory structure and file sharing support ...

- PostgreSQL metadata overlay layer on top of existing S3 storage
- 3 new tables: folders, files, share_links
- Folder CRUD: create, get with children, tree, rename, delete (cascade)
- File operations: upload to folder, move between folders
- Share links: create with optional password/expiry/download limit, public access
- S3 compensation on PG write failure
- Existing 14 endpoints untouched

2026-05-20 20:26:19 +08:00

..

main.go

feat: add directory structure and file sharing support

2026-05-20 20:26:19 +08:00