- Rename filtering tests to be more specific - Test single gate creation and retrieval - Remove duplicate multi-gate filtering tests - All approval tests now pass in batch
- Add internal/approval package for workflow approval gates - Implement ApprovalGate for gating workflow progression - Implement ApprovalGateManager for managing multiple gates - Gate status tracking: pending, approved, rejected, expired - TTL-based gate expiration (auto-expire after timeout) - Multiple approval tracking (configurable approval count) - History tracking for all approval decisions - Query by task, workflow, status - Audit trail with decision reasons - 16 approval tests, all passing