feat: sort activity lists newest-first

[anonymoususer72041]

Summary

This PR changes activity list ordering to show the newest entries first across the application where activity lists are rendered via the shared activity retrieval logic.

It updates the core activity queries to sort by the existing created-date sort field in descending order and adds a deterministic tie-breaker by activity_id (descending) to ensure stable ordering when timestamps are identical.

Additionally, the Activities module DataGrid ordering is hardened by appending an activityID tie-breaker when sorting by dateCreatedSort.

Motivation

Seeing the most recent activity first is the expected UX for activity feeds and improves day-to-day usability when reviewing recent interactions.

The deterministic activity_id tie-breaker avoids unstable ordering caused by equal timestamps, making list rendering predictable and preventing confusing “random” reordering between page loads or environments.

[anonymoususer72041]

Not sure if 691e59f is needed

[RussH]

Thanks, this looks good again!

One small point before merge: in the Activities datagrid path the tie-breaker is always appended as activityID DESC whenever sorting by dateCreatedSort. That makes ordering deterministic, but if a user explicitly sorts oldest-first the secondary ordering still runs newest ID first, which is a bit inconsistent with the chosen sort direction.

Could you either drop that second commit if it is not actually needed, or adjust it so the activityID tie-breaker follows the same direction as dateCreatedSort?

[anonymoususer72041]

Could you either drop that second commit if it is not actually needed, or adjust it so the activityID tie-breaker follows the same direction as dateCreatedSort?

It's actually not needed but useful, so I decided to provide a fix.

[RussH]

Thanks - this fix looks great.