Add deploy/portainer/federated-test.stack.yml — a Docker Swarm-compatible
Compose file for Portainer that boots a federated-tier gateway (gateway +
pgvector/pg17 + valkey:8-alpine) with Traefik HTTPS labels and digest-pinned
image (fed-v0.1.0-m1). Parameterised via STACK_NAME/HOST_FQDN for reuse
across mos-test-1 and mos-test-2 in DEPLOY-03/04. Add deploy/portainer/README.md
with deployment instructions, required env vars, and external resource notes.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>