refactor(dev): share postgres across main and worktrees

docker-compose.yml

@@ -1,12 +1,14 @@
+name: super_multica
+
 services:
   postgres:
     image: pgvector/pgvector:pg17
     environment:
-      POSTGRES_DB: ${POSTGRES_DB:-multica}
+      POSTGRES_DB: multica
       POSTGRES_USER: ${POSTGRES_USER:-multica}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-multica}
     ports:
-      - "${POSTGRES_PORT:-5432}:5432"
+      - "5432:5432"
     volumes:
       - pgdata:/var/lib/postgresql/data