[Feature]: Events (formerly Audit Logs) #3290

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

Implementation plan

• Event storage and emission framework
• /api/events/list API
• CLI
  • dstack event
  • dstack event --watch
  • Event log when provisioning resources
• Event coverage
  • Runs
    • Creation
    • Status changes
    • Deletion
    • In-place update
    • Service scaling
    • Rolling deployment
    • Service registration
  • Jobs
    • Creation
    • Status changes
    • In-place update
    • Reachable/unreachable changes
    • Probe status
    • Replica registration
  • Fleets
    • Creation
    • Status changes
    • In-place update
  • Instances
    • Creation
    • Status changes
    • Reachable/unreachable changes
    • Health changes
    • shim/runner updates
  • Users
    • Creation
    • Update
    • Deletion
  • Projects
    • Creation
    • Update
    • Deletion
    • Membership changes
  • Volumes
    • Creation
    • Status changes
    • Deletion
    • Attachment/detachment
      • To/from existing instance
      • To/from instance being created/deleted (RunPod)
  • Gateways
  • Secrets
  • Backends