- Added HubStateStore targeted delta update methods (apply_delta_quota_updated, apply_delta_account_added, apply_delta_account_removed, apply_delta_route_changed)
- Added seq sequence freshness tracking in HubStateStore to drop stale out-of-order responses
- Added trigger_refresh_provider in HermesRefreshScheduler
- Bound multi-bucket quotas to specific model families (Claude vs Gemini) with truthful is_estimated tracking
- Connected OAuth completion to targeted account added events across all providers
- Pinned antigravity_provider package root to repo via __init__.py and added import invariant verification
- Added unit tests in tests/test_state_layer_and_event_driven_quota.py and tests/test_import_invariants.py
- Zero modifications to UI zone files (views, components, theme, wizard, hermes_hub_app.py)
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