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Analysis Results: - 12 PostgreSQL fallback functions (TKG builders) - 11 API modules with direct queries - Identity binding: critical dependency Current Status: - Cannot deprecate now (Production stability) - PostgreSQL fallback necessary - Qdrant collection empty (0 points) Recommendations: - Keep PostgreSQL fallback for safety - Document migration path - New features use Qdrant/TKG - Gradual migration in future (6+ months) Migration Priority: - P1: identity_binding.rs (TKG-based) - P2: identity_agent_api.rs - P3: identity_api.rs - P4: Other APIs Conclusion: face_detections cannot be deprecated yet due to: - Production Qdrant empty - API dependencies (identity binding) - Stability requirements Status: Draft (no immediate deprecation)