Add deployment improvements and UI enhancements

- Clone specific commit SHA from webhook instead of just branch HEAD
- Log webhook payload in deployment logs
- Add build/deploy timing to ntfy and Slack notifications
- Implement container rollback on deploy failure
- Remove old container only after successful deployment
- Show relative times in deployment history (hover for full date)
- Update port mappings UI with labeled text inputs
- Add footer with version info, license, and repo link
- Format deploy key comment as upaas_DATE_appname

.golangci.yml

@@ -10,6 +10,7 @@ linters:
     # Genuinely incompatible with project patterns
     - exhaustruct      # Requires all struct fields
     - depguard         # Dependency allow/block lists
+    - godot            # Requires comments to end with periods
     - wsl              # Deprecated, replaced by wsl_v5
     - wrapcheck        # Too verbose for internal packages
     - varnamelen       # Short names like db, id are idiomatic Go