Play Framework

fix: wire OpenAPI info.version to application.version (PF-98, release 1.13.13)

The Swagger UI version badge was previously a hard-coded "1.0.0" in
OpenApiGenerator. Now it reads application.version from the app's
configuration, mirroring how info.title already reads application.name.
Falls back to "1.0.0" when the key is unset or blank, matching the
application-skel default.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>