Append an 8-char generation id (first 8 chars of deployment UUID) to:
- container name: {tenant}-{env}-{app}-{replica}-{gen}
- CAMELEER_AGENT_INSTANCEID (so old+new agents are distinct in the registry)
- Traefik cameleer.instance-id label
And emit a new standalone cameleer.generation label so dashboards
(Prometheus/Grafana) can pin deploy boundaries without regex on
instance-id.
Strategy branching comes next — this commit is foundation only; the
interim destroy-then-start flow still runs regardless of strategy.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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