health-check: route remaining bearer placeholders through $LLK env guard

scripts/litellm-health-check.sh

@@ -150,7 +150,7 @@ MODEL_FAILS=0
 for model in $MODELS; do
     echo -n "  Model $model... "
     HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" --connect-timeout 30 \
-        -H "Authorization: Bearer $MONITOR_KEY" \
+        -H "Authorization: Bearer $LLK" \
         -H "Content-Type: application/json" \
         -d "{\"model\":\"$model\",\"messages\":[{\"role\":\"user\",\"content\":\"ping\"}],\"max_tokens\":5}" \
         "http://${LITELLM_HOST}:4000/v1/chat/completions" 2>/dev/null)
@@ -166,7 +166,7 @@ done
 # 6. Agent keys
 echo -n "  Agent Keys... "
 KEYS=$(curl -s --connect-timeout 10 \
-    -H "Authorization: Bearer $MASTER_KEY" \
+    -H "Authorization: Bearer $LLK" \
     "http://${LITELLM_HOST}:4000/key/list?return_full_object=true" 2>/dev/null)
 AGENT_COUNT=$(echo "$KEYS" | python3 -c "
 import sys,json