- Remove silo-spec.md from doc table (deleted)
- Add CONFIGURATION.md, AUTH.md, AUTH_USER_GUIDE.md, frontend-spec.md to doc table
- Mark Configuration Reference as complete
- Fix audit_handlers.go filename (was handlers_audit.go)
- Update Appendix A file structure to match actual codebase
- Fix future migration numbering (012/013, since 011 is taken)
- Add file attachment endpoints to Appendix B
- Remove completed Documentation Overhaul from medium-term
Closes#28