Changes to List vector stores

added the optional property error/misalignment/review_target to the response with the 429 status

added the optional property error/misalignment/review_target to the response with the 503 status

response property data/items/expires_at list-of-types was widened by adding types null to media type application/json of response 200

response property data/items/last_active_at list-of-types was widened by adding types null to media type application/json of response 200

response property data/items/metadata list-of-types was widened by adding types null to media type application/json of response 200

api tag Vector stores added

api tag Vector Stores removed

added the non-success response with the status 429

added the non-success response with the status 503