Changes to Create KV store

added the pattern ^\s*(?:\d+\s*(?:[dD]|[dD][aA][yY][sS]?)?)?\s*$ to the query request parameter ttl

the request property key became required

the request property value became required

removed the media type */* for the response with the status 201

removed the media type */* for the response with the status 400

removed the media type */* for the response with the status 429

the endpoint scheme security OwnerToken was added to the API

added the media type application/json for the response with the status 201

added the media type application/json for the response with the status 400

added the media type application/json for the response with the status 429

the response property visibilityNotice became nullable for the status 201

the response property visibilityNotice became nullable for the status 400

the response property visibilityNotice became nullable for the status 429

added the new optional header request parameter X-Delivery-Mode