- cache: insert-then-retain pattern avoids empty-window race during refresh
- relay: manage_task_status flag for proper failover state transitions
- relay: retry_task re-resolves model groups instead of blind provider reuse
- relay: filter empty-member groups from available models list
- relay: quota cache stale entry cleanup (TTL 5x expiry)
- error: from_sqlx_unique helper for 409 vs 500 distinction
- model_config: unique constraint handling, duplicate member check
- model_config: failover_strategy whitelist, model_id vs group name conflict check
- model_config: group-scoped member removal with group_id validation
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Model Groups provide logical model names that map to multiple physical
models across providers, with automatic failover when one provider's
key pool is exhausted.
Backend:
- New model_groups + model_group_members tables with FK constraints
- Full CRUD API (7 endpoints) with admin-only write permissions
- Cache layer: DashMap-backed CachedModelGroup with load_from_db
- Relay integration: ModelResolution enum for Direct/Group routing
- Cross-provider failover: sort_candidates_by_quota + OnceLock cache
- Relay failure path: record failure usage + relay_dequeue (fixes
queue counter leak that caused connection pool exhaustion)
- add_group_member: validate model_id exists before insert
Frontend:
- saas-relay-client: accept getModel() callback for dynamic model selection
- connectionStore: prefer conversationStore.currentModel over first available
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add execute_scheduled_task helper that fetches task info and dispatches
by target_type (agent/hand/workflow)
- Replace STUB warn+simple-UPDATE with full execution flow: dispatch task,
then update state with interval-aware next_run_at calculation
- Update next_run_at using interval_seconds for recurring tasks instead
of setting NULL
- Fix pre-existing cache.rs borrow-after-move bug (id.clone() in insert)
