fix(swarm): remove postgres init-scripts bind mount for Portainer

- Remove ./docker/postgres/init-scripts bind mount from postgres service
- Fixes: 'bind source path does not exist' error in Portainer
- Init scripts are already baked into postgres image at build time

Portainer can't access repository files when deploying stacks,
so bind mounts to local paths don't work. The postgres image
already includes init scripts via Dockerfile COPY.

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

docker-compose.swarm.yml

@@ -39,7 +39,8 @@ services:
       POSTGRES_MAX_CONNECTIONS: ${POSTGRES_MAX_CONNECTIONS:-100}
     volumes:
       - postgres_data:/var/lib/postgresql/data
-      - ./docker/postgres/init-scripts:/docker-entrypoint-initdb.d:ro
+      # Note: init-scripts bind mount removed for Portainer compatibility
+      # Init scripts are baked into the postgres image at build time
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-mosaic} -d ${POSTGRES_DB:-mosaic}"]
       interval: 10s