[hotfix] Improve handling of data lake measures in API

[dominikriemer]

Purpose

Improve the handling of data lake measures when using the API:

• Keep document ID if present
• Return 404 if the requested measure is not present

Remarks

PR introduces (a) breaking change(s): no

PR introduces (a) deprecation(s): no

[bossenti]

@dominikriemer is there a need to account for this changes in the Python client?

[dominikriemer]

@dominikriemer is there a need to account for this changes in the Python client?

I had a brief look and I don't think so - can you please double-check if it's ok? The Java client had the issue that it tried to deserialize the empty response.

[bossenti]

@dominikriemer is there a need to account for this changes in the Python client?

I had a brief look and I don't think so - can you please double-check if it's ok? The Java client had the issue that it tried to deserialize the empty response.

Should be fine I guess :)

@tenthe time to work together on #774 😉