Pure formatting pass — no behavior changes. Catches the line-wrapping
drift across the new authz / api_keys / middleware / handler edits
that piled up during the implementation.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Cross-crate authn/authz data types for Phase 3.5. The Principal struct
is the resolved caller identity that auth_middleware will produce for
both cookie sessions and bearer API keys; the role/scope enums mirror
the DB CHECK constraints from migration 0006 and round-trip through
their stable string forms.
UserId is a type alias for AdminUserId — the auth layer treats an
admin row as the principal identity, so the alias avoids a rename of
the existing id type.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
