Initial commit of CK-QR Platform

api/db/migrations/01_analytics_and_admin.sql

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+CREATE TABLE IF NOT EXISTS qr_scans (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    qr_code_id UUID REFERENCES qr_codes(id) ON DELETE CASCADE,
+    ip_address VARCHAR(45),
+    user_agent TEXT,
+    os VARCHAR(100),
+    device_type VARCHAR(50),
+    scanned_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);

api/db/migrations/02_app_settings.sql

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+CREATE TABLE IF NOT EXISTS app_settings (
+    key VARCHAR(100) PRIMARY KEY,
+    value TEXT,
+    category VARCHAR(50),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Insert some default keys so they show up in the UI
+INSERT INTO app_settings (key, value, category) VALUES 
+    ('icici_merchant_id', '', 'payments'),
+    ('icici_api_key', '', 'payments'),
+    ('google_safe_browsing_key', '', 'security'),
+    ('google_client_id', '', 'auth'),
+    ('apple_service_id', '', 'auth')
+ON CONFLICT (key) DO NOTHING;

api/db/migrations/03_seed_admin.sql

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+INSERT INTO users (email, password_hash, role) 
+VALUES ('admin@ckqr.com', '$2b$10$ezY4oBvmZUc667XCKbl98.hKicJbOG9yaV9lFbZXwbeXWgMuN7L/6', 'enterprise')
+ON CONFLICT (email) DO NOTHING;