After PR #293 flipped BROUTER_URL to the dedicated host and Grafana +
manual smoke tests confirmed clean routing (US route worked, request
rate/latency/memory/logs all green), there's no reason to keep the
in-tree flagship brouter container warm any longer.
- Remove the `brouter:` service and its `./segments` bind mount from
`infrastructure/docker-compose.yml`.
- Remove `depends_on: brouter` from the planner service.
- Tighten the BROUTER_URL and BROUTER_AUTH_TOKEN env wiring from
`${…:-default}` to `${…:?message}` so a missing SOPS value fails the
compose up loudly instead of silently pointing at the removed service
(or missing auth).
- Tick tasks 5.5, 7.5, 8.4, 9.3 in the OpenSpec change; 9.4 (archive)
is the last remaining step once this merges.
Post-merge operator step: `docker image prune -f` on the flagship to
reclaim the brouter image.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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