revert: keep BEE_API_URL pointed at local prod_bee

Per request — don't fall back to the remote Bee. Local prod_bee will
need its peering fixed before /v1/chat/completions can dispatch.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

hostinger/prod-stack.yaml

@@ -56,7 +56,7 @@ services:
       DATABASE_URL: postgresql://hosted:hosted@postgres:5432/hosted_gateway?schema=public
       REDIS_HOST: redis
       REDIS_PORT: 6379
-      BEE_API_URL: https://bee.ffaerber.duckdns.org
+      BEE_API_URL: http://bee:1633
       HOSTED_GATEWAY_PORT: 8080
     networks:
       - public
@@ -95,7 +95,7 @@ services:
       DATABASE_URL: postgresql://hosted:hosted@postgres:5432/hosted_gateway?schema=public
       REDIS_HOST: redis
       REDIS_PORT: 6379
-      BEE_API_URL: https://bee.ffaerber.duckdns.org
+      BEE_API_URL: http://bee:1633
     networks:
       - internal
     deploy: