fix: pgbouncer healthcheck + minio doctor checks via docker exec

- pgbouncer: replace pg_isready with nc (not available in edoburu/pgbouncer)
- minio: add healthcheck in docker-compose.yml
- doctor: check minio/pgbouncer via docker exec instead of localhost curl
- cmd_dev: wait for healthy services, auto-create minio bucket

docker-compose.yml

@@ -39,6 +39,11 @@ services:
       MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-minioadmin}
     volumes:
       - minio_data:/data
+    healthcheck:
+      test: ["CMD-SHELL", "curl -sf http://localhost:9000/minio/health/live || exit 1"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
     restart: unless-stopped
 
   redis:
@@ -63,7 +68,7 @@ services:
       DEFAULT_POOL_SIZE: 25
       MIN_POOL_SIZE: 5
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -h 127.0.0.1 -p 6432"]
+      test: ["CMD-SHELL", "sh -c 'echo | nc -w 2 127.0.0.1 6432'"]
       interval: 5s
       timeout: 3s
       retries: 5