feat: Implement Walmart scraper and integrate with existing architecture

- Added Walmart scraper to scrape product data from Walmart.com, including category pages and product details.
- Introduced a stealth browser module to handle bot protection and improve scraping reliability.
- Created a SQLite database for tracking product history, price changes, stock events, and user favorites.
- Developed a Discord bot for user interaction, allowing location setting and stock checking at local stores.
- Implemented a favorites system to manage priority products and categories with custom notification settings.
- Added news aggregation module to fetch and analyze Pokemon TCG news from various sources.
- Created tools for API discovery and monitoring, including a backend monitor for detecting new products.
- Added unit tests for database operations, product filtering, and API endpoints to ensure functionality.
- Enhanced existing modules with improved error handling and logging for better maintainability.

tests/test_api.py

@@ -0,0 +1,68 @@
+"""
+Test Pokemon Center API endpoints directly
+"""
+
+import requests
+import json
+
+# Headers extracted from HAR capture
+HEADERS = {
+    "Accept": "application/json",
+    "Accept-Version": "1",
+    "Content-Type": "application/json",
+    "X-Store-Locale": "en-us",
+    "X-Store-Scope": "pokemon",
+    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36",
+    "Referer": "https://www.pokemoncenter.com/category/tcg-cards",
+}
+
+# Test endpoints
+ENDPOINTS = [
+    # Category listing
+    ("GET", "https://www.pokemoncenter.com/site/resourceapi/category/new-releases"),
+
+    # Product details (example SKU)
+    ("GET", "https://www.pokemoncenter.com/tpci-ecommweb-api/product/699-17113"),
+
+    # Product status
+    ("GET", "https://www.pokemoncenter.com/tpci-ecommweb-api/product/status/qgqvbkjwhe4s2mjxgeytg="),
+]
+
+print("=" * 70)
+print("Pokemon Center API Test")
+print("=" * 70)
+print()
+
+for method, url in ENDPOINTS:
+    print(f"[{method}] {url[:80]}...")
+
+    try:
+        if method == "GET":
+            response = requests.get(url, headers=HEADERS, timeout=10)
+        else:
+            response = requests.post(url, headers=HEADERS, timeout=10)
+
+        print(f"  Status: {response.status_code}")
+        print(f"  Content-Type: {response.headers.get('Content-Type', 'N/A')}")
+
+        if response.status_code == 200:
+            try:
+                data = response.json()
+                print(f"  Response keys: {list(data.keys())[:5]}...")
+
+                # Show a preview
+                preview = json.dumps(data, indent=2)[:500]
+                print(f"  Preview:\n{preview}")
+            except:
+                print(f"  Raw: {response.text[:200]}")
+        else:
+            print(f"  Response: {response.text[:200]}")
+
+    except Exception as e:
+        print(f"  Error: {e}")
+
+    print()
+
+print("=" * 70)
+print("If APIs return 200, we can monitor without a browser!")
+print("=" * 70)