Alert-rail per-app routing for terra errors

TERRA-2 terra Canceled high

terra_27 cites a GO its own text records as dead: establish disposition of what was applied

TERRA-72 terra Canceled

Move terra detail-table reads to active views + archive-context on detail soft-delete

TERRA-16 terra Canceled

terra_10 follow-up: heal-GUC visibility on appEvents (audit-trail gap WITHDRAWN as false - archive already records it)

TERRA-5 terra Canceled

db/specs/appevents-pruner-design.md:90 still names bare app.user_id GUC, stale since terra_23

TERRA-48 terra Canceled low