Richmond 0.4.0

Changelog

Bug Fixes

• 41d90dd: Fix grimes review findings: dry-run drift, pagination, observability (@tdewitt)

Other

• 5b83cbd: Auto-detect SCIM provider capabilities via /Schemas discovery (@tdewitt)
• d826158: Detect and repair drift from out-of-band SCIM deletions (@tdewitt)
• ce83809: Document schema discovery and drift detection in README (@tdewitt)
• ce853f5: Persist failed operations in state for automatic retry (@tdewitt)