feat: MercadoLibre integration + inventory bulk publish + WhatsApp bridge fixes

- Add MercadoLibre OAuth, listings, orders, webhooks and category search
- New marketplace_external_bp.py, meli_service.py, marketplace_external_service.py
- New marketplace_external.html/js with ML management UI
- Inventory: bulk publish to ML with category autocomplete, listing type and shipping selectors
- Inventory: new .btn--meli styles, select/label CSS fixes
- WhatsApp bridge: rate limiting, 440/515/408 error handling, stale watchdog
- DB migration v3.4_meli_integration.sql for marketplace_listings, orders, sync_queue
- Add Celery tasks for ML sync and webhook processing
- Sidebar: MercadoLibre navigation link

scripts/sync_estrada_to_marketplace.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+"""
+Sync Strada inventory to marketplace warehouse_inventory.
+Matches by OEM part_number and cross-references.
+"""
+import os, sys, io
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'pos'))
+from tenant_db import get_tenant_conn, get_master_conn
+
+BODEGA_ID = 7
+USER_ID = 1  # admin user in master DB
+CURRENCY = 'MXN'
+
+def main():
+    tenant_conn = get_tenant_conn(28)
+    tenant_cur = tenant_conn.cursor()
+    
+    # Get active inventory with stock
+    tenant_cur.execute("""
+        SELECT i.id, i.part_number, i.price_1, i.cost, COALESCE(iss.stock, 0) as stock
+        FROM inventory i
+        LEFT JOIN inventory_stock_summary iss ON iss.inventory_id = i.id
+        WHERE i.is_active = true
+    """)
+    items = {r[0]: {'pn': r[1], 'price': r[2], 'cost': r[3], 'stock': r[4]} for r in tenant_cur.fetchall()}
+    print(f"Active inventory: {len(items)}")
+    
+    tenant_cur.close()
+    tenant_conn.close()
+    
+    # Get catalog mappings from master
+    master = get_master_conn()
+    master_cur = master.cursor()
+    
+    master_cur.execute("SELECT id_part, oem_part_number FROM parts WHERE oem_part_number IS NOT NULL")
+    oem_map = {r[1]: r[0] for r in master_cur.fetchall()}
+    
+    master_cur.execute("SELECT part_id, cross_reference_number FROM part_cross_references")
+    cross_map = {r[1]: r[0] for r in master_cur.fetchall()}
+    
+    print(f"OEM parts: {len(oem_map)}, Cross-references: {len(cross_map)}")
+    
+    # Build match list
+    matched = []
+    seen_parts = set()
+    for item_id, data in items.items():
+        pn = data['pn']
+        raw = pn.split('-', 1)[1] if '-' in pn else pn
+        
+        part_id = oem_map.get(raw) or oem_map.get(pn) or cross_map.get(raw) or cross_map.get(pn)
+        if part_id and part_id not in seen_parts:
+            seen_parts.add(part_id)
+            price = data['price'] or data['cost'] or 0
+            stock = data['stock'] or 0
+            matched.append((USER_ID, part_id, price, stock, 1, 'Principal', BODEGA_ID, CURRENCY))
+    
+    print(f"Matched items: {len(matched)}")
+    
+    if not matched:
+        print("Nothing to sync")
+        return
+    
+    # Bulk insert via COPY
+    csv_buffer = io.StringIO()
+    for row in matched:
+        csv_buffer.write(','.join(str(c) for c in row) + '\n')
+    csv_buffer.seek(0)
+    
+    master_cur.copy_expert(
+        """COPY warehouse_inventory (user_id, part_id, price, stock_quantity, min_order_quantity, warehouse_location, bodega_id, currency)
+        FROM STDIN WITH (FORMAT CSV)""",
+        csv_buffer
+    )
+    
+    master.commit()
+    master_cur.close()
+    master.close()
+    
+    print(f"Synced {len(matched)} items to warehouse_inventory")
+
+if __name__ == '__main__':
+    main()