T8.3 - CR-011: material moves, the field hears about it once

A kitting status change (detected on the upsert, which is how the browser and
the offline outbox both save) emails the package's distribution list
(distributionIds) plus its warehouse owner (kitOwnerId - CR-010's default
recipient), minus the actor, deduplicated. The mail matches the house
convention - greeting, one line of what happened, the deep link, the
automated-message footer - and says old status, new status, who, and the
delivery location (deliveryLoc when CR-012 lands at T8.4; mimoLoc today).
The link opens THAT package (X1), same wp_link as every other mail.

No burst: an unsent notification for the same package and recipient is
REWRITTEN to the newest transition instead of joined by a sibling - three
rapid changes leave one row per recipient saying where kitting ended up,
while the audit history keeps all three, uncoalesced. Found by the probe and
fixed: a row held while email was OFF stayed 'skipped' forever; the change
that finds email ON now promotes it to pending and schedules it - otherwise
turning the gate on silently orphaned everything coalesced before it.

The gate is T7.6's gate, reused - the probe greps that no second email flag
exists anywhere. Off by default; admin-only (403 for anyone else); every send
terminates at the in-process SMTP sink with count and recipients asserted; no
real mail leaves this branch. Send failures ride the shared notify.deliver
path whose failure handling qa_gate_check pins.

Verification (each probe run alone): NEW tests/kitting_notify_check.py 17/17
(the sink is imported from qa_gate_check - one sink implementation, not two).
Regression: qa_gate_check 40/40.

Items: CR-011, D10 (X1 honored)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/reference/file-map.md

@@ -291,6 +291,7 @@ Wave 8 adds these:
 
 ```bash
 python tests/kitting_check.py        # CR-009/CR-010 - statuses, owner, filter    21 checks
+python tests/kitting_notify_check.py # CR-011 - kitting mail, coalesced, gated    17 checks
 ```
 
 **Three probes were re-pointed at `T7.1`.** `sections_check.py` 5b drove the live