[WPB-11188] LegalHold support V1

[battermann]

https://wearezeta.atlassian.net/browse/WPB-11188

Checklist

• Add a new entry in an appropriate subdirectory of changelog.d
• Read and follow the PR guidelines

[fisx]

i think this is probably ready, but as always before i'll admit that i have questions :-)

approving tentatively!

[fisx]

oh, one more (very open, sorry) question: there are requests in both directions, but if i am reading this right you've only versioned upstream. this may be fine, though, as lh-to-wire doesn't have any changes between v0 and v1 (yet)? but this thought may guide some renamings like the one mentioned above. or thinking this through may suggest some small refactorings to save us time in the future?

[fisx]

oh, one more (very open, sorry) question: there are requests in both directions, but if i am reading this right you've only versioned upstream. this may be fine, though, as lh-to-wire doesn't have any changes between v0 and v1 (yet)? but this thought may guide some renamings like the one mentioned above. or thinking this through may suggest some small refactorings to save us time in the future?

answer after phone call: lh api only goes upstream. if lh devices use client api, and if lh service wants to call wire-server for anything else, it should use galley public api (or possibly internal, but hopefully not).