Test: TandemKit message classification catalog

Augment the TandemKit emission suite with a complete (identifier, message) ->
TrioAlertClassifier.categorize table sourced from the loopkit-manager-synthesis
audit: every reported alert/error string paired with its identifier, asserting
the current classifier category (green) plus a coverage-gap ratchet for
messages whose taxonomy implies a bucket the substring classifier misses.
Spec note: production feeds the classifier String(describing: error) (case
names), not these display strings.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>