Add Dutchie AZ data pipeline and public API v1

- Add dutchie-az module with GraphQL product crawler, scheduler, and admin UI
- Add public API v1 endpoints (/api/v1/products, /categories, /brands, /specials, /menu)
- API key auth maps dispensary to dutchie_az store for per-dispensary data access
- Add frontend pages for Dutchie AZ stores, store details, and schedule management
- Update Layout with Dutchie AZ navigation section

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

backend/src/dutchie-az/db/connection.ts

@@ -0,0 +1,78 @@
+/**
+ * Dutchie AZ Database Connection
+ *
+ * Isolated database connection for Dutchie Arizona data.
+ * Uses a separate database/schema to prevent cross-contamination with main app data.
+ */
+
+import { Pool, PoolClient } from 'pg';
+
+// Environment variable for Dutchie AZ database (falls back to main DB with schema prefix)
+const DUTCHIE_AZ_DATABASE_URL =
+  process.env.DUTCHIE_AZ_DATABASE_URL ||
+  process.env.DATABASE_URL ||
+  'postgresql://dutchie:dutchie_local_pass@localhost:54320/dutchie_az';
+
+let pool: Pool | null = null;
+
+/**
+ * Get the Dutchie AZ database pool (singleton)
+ */
+export function getDutchieAZPool(): Pool {
+  if (!pool) {
+    pool = new Pool({
+      connectionString: DUTCHIE_AZ_DATABASE_URL,
+      max: 10,
+      idleTimeoutMillis: 30000,
+      connectionTimeoutMillis: 5000,
+    });
+
+    pool.on('error', (err) => {
+      console.error('[DutchieAZ DB] Unexpected error on idle client:', err);
+    });
+
+    console.log('[DutchieAZ DB] Pool initialized');
+  }
+  return pool;
+}
+
+/**
+ * Execute a query on the Dutchie AZ database
+ */
+export async function query<T = any>(text: string, params?: any[]): Promise<{ rows: T[]; rowCount: number }> {
+  const p = getDutchieAZPool();
+  const result = await p.query(text, params);
+  return { rows: result.rows as T[], rowCount: result.rowCount || 0 };
+}
+
+/**
+ * Get a client from the pool for transaction use
+ */
+export async function getClient(): Promise<PoolClient> {
+  const p = getDutchieAZPool();
+  return p.connect();
+}
+
+/**
+ * Close the pool connection
+ */
+export async function closePool(): Promise<void> {
+  if (pool) {
+    await pool.end();
+    pool = null;
+    console.log('[DutchieAZ DB] Pool closed');
+  }
+}
+
+/**
+ * Check if the database is accessible
+ */
+export async function healthCheck(): Promise<boolean> {
+  try {
+    const result = await query('SELECT 1 as ok');
+    return result.rows.length > 0 && result.rows[0].ok === 1;
+  } catch (error) {
+    console.error('[DutchieAZ DB] Health check failed:', error);
+    return false;
+  }
+}