[OB3 OpenAPI] Pagination link expressions use $request.path instead of $request.query for limit/offset

[PatStLouis]

The GET /credentials operation defines four pagination links (next, last, prev, first) in components/links. Each link uses the following parameter expressions:

  "limit": "$request.path.limit",                                                                                      
  "offset": "$request.path.offset"

However, limit and offset are query parameters on GET /credentials, not path parameters. The correct runtime expressions per the OpenAPI 3.0 specification should be:

  "limit": "$request.query.limit",
  "offset": "$request.query.offset"

Impact: Tools that validate OpenAPI link definitions flag these as invalid and skip all stateful tests for the endpoint, since $request.path.limit references a non-existent path parameter.

Affected file: ob_v3p0_oas.json, components/links — all four link objects (next, last, prev, first).