Address review feedback:
- Gate the APPLICATION_ROOT-aware Swagger/OpenAPI registration on
FAB_API_SWAGGER_UI so the global Swagger disable still takes precedence.
- Suppress FAB's default OpenAPI/Swagger views (FAB_ADD_OPENAPI_VIEWS) when
the prefix-aware variant is active, so the two don't register duplicate URL
rules for /api/<version>/_openapi and /swagger/<version>.
- Normalize APPLICATION_ROOT (treat '/' as empty, strip trailing slash) so the
Swagger UI spec URL is not built as a protocol-relative '//api/...' URL.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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