Mejoras de sesion: estabilizacion, IA, Nexus Yonke y marketplace B2B

- F0 blindaje: Redis/Celery, pg_hba sin trust LAN, secretos a env 600, backups, webhook auth, jobs muertos
- F1 caja: bugs POS, reembolsos al corte, apartados, CFDI, topes de descuento en cotizacion/apartado
- F2/F7 IA de catalogo: autocategorizacion, dedup de SKUs con embeddings, OCR de facturas, descripciones, claves SAT, limpieza de fitment
- F3 IA en el flujo: vision Yonke, preguntas MeLi, venta cruzada, anomalias, sinonimos, busqueda semantica (rerank/embeddings)
- F4/F8 escala y cartera: /metrics+Prometheus+Grafana, pool, score de credito, churn, metricas multi-tenant
- Nexus Yonke (M1-M6): modelo de datos 1-de-1, alta por donador, vitrina publica, MeLi usado, consignacion, garantia por dias, reportes, etiquetas
- Marketplace B2B entre yonkes (catalogo + pedidos cross-tenant)
- Seguridad: auth en /api/admin/* (35 endpoints), alertas por tenant
- Migraciones v4.27/v4.28; timers expire-demos y rollup-metrics

pos/services/push_service.py

@@ -45,11 +45,11 @@ def get_or_create_vapid_keys(conn):
 
     # Check if keys already exist in config
     try:
-        cur.execute("SELECT value FROM config WHERE key = 'vapid_private_key'")
+        cur.execute("SELECT value FROM tenant_config WHERE key = 'vapid_private_key'")
         row = cur.fetchone()
         if row:
             private_key = row[0]
-            cur.execute("SELECT value FROM config WHERE key = 'vapid_public_key'")
+            cur.execute("SELECT value FROM tenant_config WHERE key = 'vapid_public_key'")
             pub_row = cur.fetchone()
             public_key = pub_row[0] if pub_row else None
             cur.close()
@@ -68,11 +68,11 @@ def get_or_create_vapid_keys(conn):
         # Store in config table
         try:
             cur.execute("""
-                INSERT INTO config (key, value) VALUES ('vapid_private_key', %s)
+                INSERT INTO tenant_config (key, value) VALUES ('vapid_private_key', %s)
                 ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value
             """, (private_pem,))
             cur.execute("""
-                INSERT INTO config (key, value) VALUES ('vapid_public_key', %s)
+                INSERT INTO tenant_config (key, value) VALUES ('vapid_public_key', %s)
                 ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value
             """, (public_b64,))
             conn.commit()