Server command loads config, opens and migrates DB, creates auth
client, blob storage, GC collector, policy engine, OCI handler,
mounts HTTP routes (OCI + admin REST), starts optional gRPC server,
and handles graceful shutdown on SIGINT/SIGTERM.
Status command performs a health check against the /v1/health endpoint
with optional CA cert for TLS verification.
Snapshot command performs VACUUM INTO to /srv/mcr/backups/.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
