fix(preflight): Apply stored fingerprint to task browser

- Add WorkerFingerprint interface with timezone, city, state, ip, locale
- Store fingerprint in TaskWorker after preflight passes
- Pass fingerprint through TaskContext to handlers
- Apply timezone via CDP and locale via Accept-Language header
- Ensures browser fingerprint matches proxy IP location

This fixes anti-detect detection where timezone/locale mismatch
with proxy IP was getting blocked by Cloudflare.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/scripts/test-treez-client.ts

@@ -0,0 +1,113 @@
+/**
+ * Test script for Treez platform client
+ * Tests the new Treez integration with Best Dispensary
+ *
+ * Usage: npx ts-node scripts/test-treez-client.ts
+ */
+
+import {
+  fetchProductsByStoreId,
+} from '../src/platforms/treez';
+import { TreezNormalizer } from '../src/hydration/normalizers/treez';
+
+const TEST_STORE_ID = 'best';
+
+async function main() {
+  console.log('='.repeat(60));
+  console.log('Treez Platform Client Test');
+  console.log('='.repeat(60));
+  console.log(`Test Store: ${TEST_STORE_ID}`);
+  console.log('');
+
+  try {
+    // Test 1: Fetch products from store
+    console.log('[Test 1] Fetching products from Treez store...');
+    const result = await fetchProductsByStoreId(TEST_STORE_ID);
+
+    console.log('');
+    console.log('[Results]');
+    console.log(`  Store: ${result.store.name}`);
+    console.log(`  Store ID: ${result.store.storeId}`);
+    console.log(`  Products captured: ${result.products.length}`);
+    console.log(`  Scroll count: ${result.scrollCount}`);
+
+    if (result.products.length > 0) {
+      console.log('');
+      console.log('[Sample Products (first 5)]');
+      for (const p of result.products.slice(0, 5)) {
+        console.log(`  - ${p.name}`);
+        console.log(`    Brand: ${p.brand || 'N/A'}`);
+        console.log(`    Category: ${p.category || 'N/A'} / ${p.subcategory || 'N/A'}`);
+        console.log(`    Price: ${p.price ? '$' + p.price : 'N/A'}`);
+        console.log(`    THC: ${p.thcPercent !== null ? p.thcPercent + '%' : 'N/A'}`);
+      }
+
+      // Test 2: Normalize products
+      console.log('');
+      console.log('[Test 2] Testing normalizer...');
+      const normalizer = new TreezNormalizer();
+
+      // Build a fake payload structure
+      const fakePayload = {
+        id: 'test-payload',
+        dispensary_id: 9999,
+        crawl_run_id: null,
+        platform: 'treez',
+        payload_version: 1,
+        raw_json: { products: result.products },
+        product_count: result.products.length,
+        pricing_type: null,
+        crawl_mode: null,
+        fetched_at: new Date(),
+        processed: false,
+        normalized_at: null,
+        hydration_error: null,
+        hydration_attempts: 0,
+        created_at: new Date(),
+      };
+
+      const normalized = normalizer.normalize(fakePayload);
+
+      console.log(`  Products normalized: ${normalized.products.length}`);
+      console.log(`  Brands extracted: ${normalized.brands.length}`);
+      console.log(`  Categories extracted: ${normalized.categories.length}`);
+      console.log(`  Errors: ${normalized.errors.length}`);
+
+      if (normalized.products.length > 0) {
+        console.log('');
+        console.log('[Sample Normalized Product]');
+        const np = normalized.products[0];
+        console.log(`  External ID: ${np.externalProductId}`);
+        console.log(`  Name: ${np.name}`);
+        console.log(`  Brand: ${np.brandName}`);
+        console.log(`  Category: ${np.category}`);
+        console.log(`  Type: ${np.type}`);
+        console.log(`  Strain: ${np.strainType}`);
+        console.log(`  THC: ${np.thcPercent !== null ? np.thcPercent + '%' : 'N/A'}`);
+        console.log(`  CBD: ${np.cbdPercent !== null ? np.cbdPercent + '%' : 'N/A'}`);
+        console.log(`  Image: ${np.primaryImageUrl?.slice(0, 60) || 'N/A'}...`);
+
+        const pricing = normalized.pricing.get(np.externalProductId);
+        if (pricing) {
+          console.log(`  Price (cents): ${pricing.priceRec}`);
+        }
+      }
+    }
+
+    console.log('');
+    console.log('='.repeat(60));
+    console.log('TEST PASSED');
+    console.log('='.repeat(60));
+
+  } catch (error: any) {
+    console.error('');
+    console.error('='.repeat(60));
+    console.error('TEST FAILED');
+    console.error('='.repeat(60));
+    console.error(`Error: ${error.message}`);
+    console.error(error.stack);
+    process.exit(1);
+  }
+}
+
+main().catch(console.error);