pg: Write both origin visit updates & status, read from origin_visit

This partially reverts commit [1].

That now (still) writes new origin visit status...

But, as before [1]:

• update origin visit (with same values as origin visit status)
• read from origin visit

That does not revert the new in-memory (D2937) nor the cassandra (D2939)
storage implementations.

[1] a720caed6eebbb68a9f9b5be554a52859aa052d6 D2938
Related to D2938
Related to T2310#44043