Final step (task 9.4) of the BRouter relocation. The change is moved to
openspec/changes/archive/2026-04-24-relocate-brouter-to-dedicated-host/
and the four delta specs (brouter-integration, infrastructure,
observability, security-hardening) are merged into the main specs:
+ 6 added requirements
~ 4 modified requirements
The two intentionally-unchecked tasks are 2.2 (obsoleted, see crossed-out
note) and 9.4 itself (this archive).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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