fix: remove stale port binding and deprecated version key from compose

- Remove ports: mapping (192.168.2.47:8001:8001 — stale IP from prior host,
  caused 'cannot assign requested address' bind failure). Agent is only
  reachable via activeblue-net; no host exposure needed.
- Remove top-level version: key (obsolete, triggers deprecation warning).

These fixes were applied manually on the miaai host but never committed,
causing git pull to conflict and the Python fixes to silently not apply.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.9'
-
 services:
   agent-service:
     build:
@@ -8,8 +6,6 @@ services:
     container_name: activeblue-agent
     restart: unless-stopped
     env_file: .env
-    ports:
-      - '192.168.2.47:8001:8001'
     depends_on:
       agent-db:
         condition: service_healthy