Merge `RainVUE` into `develop`

[aufdenkampe]

Pulling in work done under

• #416

Data have been streaming nicely (with a few -9999 values here and there...). See https://monitormywatershed.org/sites/WOODB-Well18/

I probably need to clean up a few things and add documentation, so this PR is meant track that final effort.

[SRGDamia1]

Please add your changes to the change log!

[aufdenkampe]

Merged, as everything looks good!