[FEATURE] Add ARCANE_LOAD_TIMESTAMP

[jeppe742]

Description

When doing incremental loading of data you are often interested in the timestamp that a row was inserted/created.
In practice you often need the technical timestamp that the row was modified in your ingestion layer, rather than the business date from the source system.
E.g if you have to reload some data, the technical timestamp might be very different from the business timestamp

Possible solution

When Arcane will be responsible for merging the data directly into the target table, if would be great if we could include a column with the current timestamp.
Maybe called ARCANE_LOAD_TIMESTAMP or something, that just contains the current timestamp that the row was modified.

Alternatives

No response

Context

No response