Add PRODUCTION alert for main branch CI failures

When CI fails on main, notification escalates to 🚨 with
"PRODUCTION CI FAILED" header and instructions to verify
tsharps.com is still working.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ci-notify.sh

@@ -35,7 +35,24 @@ ${SUITE_INFO}
 
 elif [ "$STATUS" = "fail" ]; then
   ICON="❌"
-  MSG="${ICON} CI FAILED on ${BRANCH} (${COMMIT})
+  if [ "$BRANCH" = "main" ]; then
+    ICON="🚨"
+    MSG="${ICON} PRODUCTION CI FAILED on main (${COMMIT})
+
+⚠️ PRODUCTION DEPLOY SHOULD BE BLOCKED — tests did not pass.
+If deploy-production.yml ran, it should have reverted automatically.
+Verify tsharps.com is still working!
+
+Tests: ${SUMMARY}
+Features: ${FEATURES}
+Duration: ${DURATION}
+Pushed by: ${ACTOR}
+${SUITE_INFO}
+
+${TAG_USERS} — PRODUCTION needs immediate attention.
+@TSHARPSbm_bot"
+  else
+    MSG="${ICON} CI FAILED on ${BRANCH} (${COMMIT})
 
 Tests: ${SUMMARY}
 Features: ${FEATURES}
@@ -45,6 +62,7 @@ ${SUITE_INFO}
 
 ${TAG_USERS} — this build needs attention.
 @TSHARPSbm_bot"
+  fi
 
 elif [ "$STATUS" = "error" ]; then
   ICON="🚨"