fix(ui): include source in trace child coalesce key

PR-Agent re-review flagged that adjacent trace rows from different
services with the same event/message/stage/level/module would still
merge because `source` was missing from the coalesce key. A request
that fans out across multiple services would lose the second service's
row behind a `× 2` badge.

Add `source` to the trace child coalesce key so each participating
service stays visible in the trace timeline.

Refs #1138, #1151
This commit is contained in:
Tam Nhu Tran
2026-04-30 15:37:21 -04:00
parent b7cfbd14e2
commit 75cdc02c1f
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