feat: add migrations, test scripts, and utility tools

- Add database migrations (006-028) for face recognition, identity, file_uuid
- Add test scripts for ASR, face, search, processing
- Add portal frontend (Tauri)
- Add config, benchmark, and monitoring utilities
- Add model checkpoints and pretrained model references

migrations/020_create_mac_allocations.sql

@@ -0,0 +1,55 @@
+-- Migration: Create mac_allocations table for MAC-based resource allocation
+-- Purpose: MAC address binding for license and resource control
+-- Date: 2026-04-27
+
+-- Create mac_allocations table (simplified version for MVP)
+CREATE TABLE IF NOT EXISTS mac_allocations (
+    mac_address VARCHAR(17) PRIMARY KEY,
+    machine_name VARCHAR(100),
+    license_key VARCHAR(64),
+    is_active BOOLEAN DEFAULT true,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    updated_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+-- Add comments
+COMMENT ON TABLE mac_allocations IS 
+'MAC address resource allocation: license binding and machine identification';
+
+COMMENT ON COLUMN mac_allocations.mac_address IS 
+'Network interface MAC address (format: a1:b2:c3:d4:e5:f6)';
+
+COMMENT ON COLUMN mac_allocations.machine_name IS 
+'Human-readable machine name (e.g., MacBook-Pro)';
+
+COMMENT ON COLUMN mac_allocations.license_key IS 
+'License key bound to this MAC address';
+
+COMMENT ON COLUMN mac_allocations.is_active IS 
+'Whether this MAC is currently active';
+
+-- Create indexes
+CREATE INDEX IF NOT EXISTS idx_mac_allocations_license 
+ON mac_allocations(license_key);
+
+CREATE INDEX IF NOT EXISTS idx_mac_allocations_active 
+ON mac_allocations(is_active);
+
+-- Insert default MAC allocation for current machine (placeholder)
+-- Actual MAC address will be inserted during first registration
+-- INSERT INTO mac_allocations (mac_address, machine_name, license_key, is_active)
+-- VALUES ('<actual_mac>', 'MacBook-Pro', 'demo_license', true);
+
+-- Update trigger for updated_at
+CREATE OR REPLACE FUNCTION update_mac_allocations_updated_at()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER trigger_mac_allocations_updated_at
+BEFORE UPDATE ON mac_allocations
+FOR EACH ROW
+EXECUTE FUNCTION update_mac_allocations_updated_at();