[Feature]: Events (formerly Audit Logs)

[jvstme]

https://docs.google.com/document/d/1TChZyLjETnSF5mkTXEXBuO2m-FL-E8ceTI1lkHongSg

Implementation plan

• [x] Event storage and emission framework
• [x] /api/events/list API
• [ ] CLI
  • [x] dstack event
  • [ ] dstack event --watch
  • [ ] Event log when provisioning resources
• [ ] Event coverage
  • [ ] Runs
    • [x] Creation
    • [x] Status changes
    • [x] Deletion
    • [ ] In-place update
    • [ ] Service scaling
    • [ ] Rolling deployment
  • [ ] Jobs
    • [x] Creation
    • [x] Status changes
    • [ ] In-place update
    • [ ] Reachable/unreachable changes
    • [ ] Probe status and replica registration
  • [ ] Fleets
    • [x] Creation
    • [x] Status changes
    • [ ] In-place update
  • [ ] Instances
    • [x] Creation
    • [ ] Status changes
    • [ ] Reachable/unreachable changes
    • [ ] Health changes
  • [x] Users
    • [x] Creation
    • [x] Update
    • [x] Deletion
  • [ ] Projects
    • [x] Creation
    • [x] Update
    • [x] Deletion
    • [ ] Membership changes
  • [ ] Volumes
  • [ ] Gateways
  • [ ] Secrets
  • [ ] Backends
• [ ] #3309
• [ ] #3397