chore: make release — образы в реестр по умолчанию, архив по out=file

- out=registry (по умолчанию): release зависит от push, в build/<ver>/ —
  только compose, .env и README с docker compose pull.
- out=file: как раньше — образы и rabbitmq/redis/postgres в .tar.gz.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -204,7 +204,8 @@ Releases:
 
 ```bash
 make build ver=v0.1.0      # docker images robotex-api:v0.1.0 and robotex-worker:v0.1.0
-make release ver=v0.1.0    # images + deploy bundle in build/v0.1.0/ (compose, .env, images .tar.gz)
+make release ver=v0.1.0    # push images to docker.sokolab.xyz + deploy bundle in build/v0.1.0/ (compose, .env)
+make release ver=v0.1.0 out=file  # same, but images go to build/v0.1.0/robotex-v0.1.0.tar.gz instead of the registry
 ```
 
 Details (Xvfb, tini, `/dev/shm`, env settings, load measurements) — [docs/Deployment.md](docs/Deployment.md).