Support snapshots to permanently save the currently retrieved logs #32
Description
Why
Log rotation often wipes old data. Sometimes you want to save what you're seeing right now for later - debugging, audits, sharing, etc.
What
- Add "Save snapshot" button in the UI
- Export current view (query + time range) to file and store it to s3 (or database or file?) - storage should be configurable via config file
- Show link to download or re-open snapshot later
- Add snapshot listing page
- Snapshot cleanup?