refactor: add helper method to create zbp attachment metadata from fit connect attachment (planning#2016)

refactor: move object mapper to provider class, add instant serializer for createDate that matches required pattern (planning#2016)

refactor: avoid writing the commit id template into the request header when not available. This might break requests that are validates by an ASG (planning#2016)

planning#2287 Release 2.2.0 (planning#2287)

See merge request !444