feat: add Telegram notifications to PostSync smoke tests + new tests for researchowl/openclaw

- Create telegram-notify secret in n8n, portfolio, polymarket-bot, researchowl, openclaw
  namespaces (values mirrored from monitoring/grafana-telegram)
- Update existing smoke tests (n8n, portfolio, polymarket-bot) to send [OK]/[FAIL]
  Telegram notifications on success/failure
- Add postsync-smoke-test for openclaw (curl GET / on port 18789)
- Add postsync-smoke-test for researchowl (no HTTP port; checks readyReplicas via
  k8s API using a smoke-test-reader ServiceAccount + Role + RoleBinding)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

n8n/postsync-smoke-test.yaml

@@ -15,18 +15,43 @@ spec:
       containers:
       - name: smoke-test
         image: curlimages/curl:latest
+        env:
+        - name: TELEGRAM_BOT_TOKEN
+          valueFrom:
+            secretKeyRef:
+              name: telegram-notify
+              key: TELEGRAM_BOT_TOKEN
+        - name: TELEGRAM_CHAT_ID
+          valueFrom:
+            secretKeyRef:
+              name: telegram-notify
+              key: TELEGRAM_CHAT_ID
         command: ["/bin/sh", "-c"]
         args:
           - |
             set -e
             BASE="http://n8n.n8n.svc.cluster.local:5678"
 
+            notify() {
+              curl -s --max-time 10 -X POST \
+                "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
+                -d "chat_id=${TELEGRAM_CHAT_ID}" \
+                --data-urlencode "text=$1" \
+                > /dev/null || true
+            }
+
+            fail() {
+              notify "[FAIL] n8n PostSync: $1"
+              exit 1
+            }
+
             echo "--- [1/1] GET /healthz ---"
             HEALTH=$(curl -sf --max-time 15 --retry 3 --retry-delay 5 --retry-all-errors \
-              "$BASE/healthz")
+              "$BASE/healthz") || fail "GET /healthz unreachable"
             echo "$HEALTH"
             echo "$HEALTH" | grep -qF '"status":"ok"' \
-              || { echo "FAIL: n8n health check did not return status ok"; exit 1; }
+              || fail "health response missing status:ok"
             echo "OK"
 
+            notify "[OK] n8n PostSync passed"
             echo "=== n8n: all smoke tests passed ==="