Migrate rForum provisioning metadata from shared PG pool to Automerge.
rForum was the last module using PostgreSQL; shared/db/pool.ts is now archived.
- Create modules/rforum/schemas.ts (ForumDoc, ForumInstance, ProvisionLog)
- Rewrite mod.ts: replace sql with Automerge getDoc/changeDoc, add onInit
- Rewrite provisioner.ts: pass SyncServer, logStep/updateInstance via changeDoc
- Fix dashboard snake_case → camelCase field references
- Archive schema.sql and shared/db/pool.ts
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
