chore(19.1): require chatvideo user-deletion test in phase 19.1 gate

- PG_CHATVIDEO_TESTS runs TestUserDeletionReassignsSession (WR-05)
- self-test lists the token and pins it in the PG_CHATVIDEO_TESTS line
- NOT RUN postgres banner names it

scripts/check-phase19.1.sh

@@ -83,7 +83,7 @@ PG_USERFRIENDS_TESTS=(TestHTTPTracer TestUserDeletingHeir TestGroupVisibilityGat
 PG_FORUM_TESTS=(TestHTTPTracer TestUserDeletionAnonymizes)
 PG_CHATBOTS_TESTS=(TestHTTPTracer TestUserDeletionCascadesBotFlag)
 PG_HERALD_TESTS=(TestHTTPTracer TestSendEventRollback)
-PG_CHATVIDEO_TESTS=(TestHTTPTracer TestReconcileEmptyRoom)
+PG_CHATVIDEO_TESTS=(TestHTTPTracer TestReconcileEmptyRoom TestUserDeletionReassignsSession)
 
 usage() {
 	cat >&2 <<'EOF'
@@ -250,12 +250,18 @@ run_self_test() {
 		TestReconcileEmptyRoom TestAccessResolverDefault TestPHPMethodMap \
 		TestFixtureAbsentFromProduction TestSendEventRollback \
 		TestUserDeletingHeir TestUserDeletionAnonymizes TestUserDeletionCascadesBotFlag \
+		TestUserDeletionReassignsSession \
 		SherClockHolmes/webpush-go livekit/server-sdk-go/v2; do
 		grep -qF "$token" "${BASH_SOURCE[0]}" || {
 			echo "refuse: self-test missing required token $token" >&2
 			return 1
 		}
 	done
+	# The token loop matches its own line, so pin the postgres list itself.
+	grep -qE '^PG_CHATVIDEO_TESTS=\(.*\bTestUserDeletionReassignsSession\b' "${BASH_SOURCE[0]}" || {
+		echo "refuse: PG_CHATVIDEO_TESTS does not require TestUserDeletionReassignsSession" >&2
+		return 1
+	}
 	if grep -nE '^run_admin|^run_layers' "${BASH_SOURCE[0]}"; then
 		echo "refuse: admin/layers stage present" >&2
 		return 1
@@ -406,7 +412,8 @@ TestUserDeletingHeir), sm-forum-plugin (TestHTTPTracer,
 TestUserDeletionAnonymizes), sm-chatbots-plugin (TestHTTPTracer,
 TestUserDeletionCascadesBotFlag), sm-herald-plugin (TestHTTPTracer,
 TestSendEventRollback) and sm-chatvideo-plugin (TestHTTPTracer,
-TestReconcileEmptyRoom) did NOT run. Run on a Docker host before
+TestReconcileEmptyRoom, TestUserDeletionReassignsSession) did NOT run.
+Run on a Docker host before
 /msd-verify-work:
   bash scripts/check-phase19.1.sh postgres
 ************************************************************************