refactor: decompose CLAUDE.md into directory-scoped files
Root CLAUDE.md reduced from 475 to 175 lines (75 excl. GitNexus).
Detailed context now loads automatically only when editing code in
the relevant directory:
- provisioning/CLAUDE.md — env vars, provisioning flow, lifecycle
- config/CLAUDE.md — auth, scopes, JWT, OIDC role extraction
- docker/CLAUDE.md — routing, networks, bootstrap, deployment pipeline
- installer/CLAUDE.md — deployment modes, compose templates, env naming
- ui/CLAUDE.md — frontend files, sign-in UI
No information lost — everything moved, nothing deleted.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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