Add structured values for ATC check variants (CHKV)

[bjoern-jueliger-sap]

This adds structured values and lists of structured values as possible types for parameters of checks that are included in a CHKV variant, which will be supported in a future release by the ATC Check Variant editor.

These structured values are the JSON representation of arbitrary ABAP structures whose fields are themselves not structured (i.e. correspond to the existing "value" JSON type here). Lists of structured values are correspondingly the JSON representation of ABAP table types whose line type is such a structure.

The format version has not been increased since JSONs from the earlier version are still fully compatible, as only optional fields have been added to the possible items of the parameters list.

[bjoern-jueliger-sap]

Welp, apparently the automated compatibility check disagrees that adding these fields is compatible with a simple "Something was added". Perhaps it does not consider the required/non-required characteristics of added types correctly?

[albertmink]

@bjoern-jueliger-sap this check is not required for a reason 😄 This isn't to suggest that the check is incorrect, but there's a possibility it might be.

[huber-nicolas]

@bjoern-jueliger-sap thanks for the pull request.
Can you adapt the example CHKV "z_aff_example_chkv", which is already uploaded into the main branch of this repository, so that it also shows the new structure value parameters in its json?

[bjoern-jueliger-sap]

@bjoern-jueliger-sap thanks for the pull request. Can you adapt the example CHKV "z_aff_example_chkv", which is already uploaded into the main branch of this repository, so that it also shows the new structure value parameters in its json?

The current example is "real" in that it uses actual SAP-delivered checks, i.e. importing this into a current ABAP release would give a check variant you can actually execute. Is that required for the example?

If yes, we cannot add the new structures yet because there are no checks that use this feature yet.

[huber-nicolas]

@bjoern-jueliger-sap thanks for the pull request. Can you adapt the example CHKV "z_aff_example_chkv", which is already uploaded into the main branch of this repository, so that it also shows the new structure value parameters in its json?

The current example is "real" in that it uses actual SAP-delivered checks, i.e. importing this into a current ABAP release would give a check variant you can actually execute. Is that required for the example?

If yes, we cannot add the new structures yet because there are no checks that use this feature yet.

If there are no checks which use these new structures yet, then it is ok for me to keep the example chkv as it is now

[wurzka]

Thanks for contributing your changes to the CHKV file format. @huber-nicolas asked me to have a look into it. Generally, it looks good to me. I just added two comments regarding names and titles.

[wurzka]

Thanks, looks good to me, now :) Due to our compatibility specifications, this pull request does not provide an incompatible change, so the failing check can be ignored.