diff --git a/.gitea/workflows/deploy-prod.yml b/.gitea/workflows/deploy-prod.yml
index f446687..be153c7 100644
--- a/.gitea/workflows/deploy-prod.yml
+++ b/.gitea/workflows/deploy-prod.yml
@@ -110,7 +110,7 @@ jobs:
     - name: Create Backup
       run: |
         echo "📦 Creating backup of current deployment..."
-        ssh -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} << 'EOF'
+        ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} << 'EOF'
           set -e
           BACKUP_DIR="/home/kjh2064/quantengine_backup"
           BACKUP_NAME="quantengine_$(date +%Y%m%d_%H%M%S)"
@@ -142,11 +142,11 @@ jobs:
         ARCHIVE_NAME=$(ls -1 quant-engine-release-*.tar.gz | head -1)
 
         # Create temporary directory on remote
-        ssh -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} \
+        ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} \
           "mkdir -p /tmp/quant-deploy && chmod 777 /tmp/quant-deploy"
 
         # Transfer archive
-        scp -i ~/.ssh/id_ed25519 "$ARCHIVE_NAME" \
+        scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 "$ARCHIVE_NAME" \
           ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }}:/tmp/quant-deploy/
 
         echo "✅ Package transferred"
@@ -154,7 +154,7 @@ jobs:
     - name: Extract and Install
       run: |
         echo "📦 Extracting and installing..."
-        ssh -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} << 'EOF'
+        ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} << 'EOF'
           set -e
 
           DEPLOY_PATH="${{ env.DEPLOY_PATH }}"
@@ -182,7 +182,7 @@ jobs:
     - name: Restart Service
       run: |
         echo "🔄 Restarting quantengine service to apply changes (Downtime minimal)..."
-        ssh -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} << 'EOF'
+        ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} << 'EOF'
           set -e
 
           # Restart service
@@ -203,15 +203,15 @@ jobs:
 
     - name: Health Check
       run: |
-        echo "🧪 Running health checks..."
+        echo "🧪 Running health checks on remote host..."
 
-        # Wait for service to be ready (localhost:5000/quant/ through Nginx/Kestrel)
+        # Wait for service to be ready (localhost:5000/quant/ through Kestrel inside remote host)
         for i in {1..30}; do
-          HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" \
-            "http://127.0.0.1:5000/quant/" || echo "000")
+          HTTP_CODE=$(ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} \
+            "curl -s -o /dev/null -w \"%{http_code}\" http://127.0.0.1:5000/quant/" || echo "000")
 
           if [ "$HTTP_CODE" = "200" ]; then
-            echo "✅ Health check passed (HTTP $HTTP_CODE at localhost:5000/quant/)"
+            echo "✅ Health check passed (HTTP $HTTP_CODE inside remote host)"
             break
           fi
 
@@ -222,7 +222,7 @@ jobs:
         if [ "$HTTP_CODE" != "200" ]; then
           echo "❌ Health check failed after 60 seconds"
           echo "Service logs:"
-          ssh -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} \
+          ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 ${{ env.DEPLOY_USER }}@${{ env.DEPLOY_HOST }} \
             "sudo journalctl -u ${{ env.SERVICE_NAME }} -n 20" || true
           exit 1
         fi
@@ -333,11 +333,11 @@ jobs:
     steps:
     - name: Performance Baseline
       run: |
-        echo "📈 Collecting performance metrics..."
+        echo "📈 Collecting performance metrics via Public IP..."
 
         # Page load time
         START=$(date +%s%N)
-        curl -s http://${{ env.DEPLOY_HOST }}/quant/ > /dev/null
+        curl -s http://178.104.200.7/quant/ > /dev/null
         END=$(date +%s%N)
         LOAD_TIME=$(( (END - START) / 1000000 ))
 
diff --git a/.gitea/workflows/snapshot_admin_deploy.yml b/.gitea/workflows/snapshot_admin_deploy.yml
index 74c8634..98dfa0d 100644
--- a/.gitea/workflows/snapshot_admin_deploy.yml
+++ b/.gitea/workflows/snapshot_admin_deploy.yml
@@ -39,20 +39,17 @@ jobs:
         run: |
           echo "[deploy] setting up SSH and deploying shadow copy"
           mkdir -p ~/.ssh
-          echo "$SSH_PRIVATE_KEY" | base64 -d > ~/.ssh/id_ed25519
-          wc -c ~/.ssh/id_ed25519
-          md5sum ~/.ssh/id_ed25519
+          echo "$SSH_PRIVATE_KEY" > ~/.ssh/id_ed25519
           chmod 600 ~/.ssh/id_ed25519
-          ssh-keyscan -H 178.104.200.7 >> ~/.ssh/known_hosts
 
           # Upload artifact and deploy script to host
-          ssh -i ~/.ssh/id_ed25519 kjh2064@178.104.200.7 "mkdir -p /home/kjh2064/tmp"
-          scp -i ~/.ssh/id_ed25519 quantengine.tar.gz kjh2064@178.104.200.7:/home/kjh2064/tmp/quantengine.tar.gz
+          ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 kjh2064@178.104.200.7 "mkdir -p /home/kjh2064/tmp"
+          scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 quantengine.tar.gz kjh2064@178.104.200.7:/home/kjh2064/tmp/quantengine.tar.gz
           
           # Execute hot deploy script
-          ssh -i ~/.ssh/id_ed25519 kjh2064@178.104.200.7 "chmod +x /home/kjh2064/tmp/deploy.sh 2>/dev/null || true"
-          scp -i ~/.ssh/id_ed25519 tools/deploy_quantengine.sh kjh2064@178.104.200.7:/home/kjh2064/tmp/deploy.sh
-          ssh -i ~/.ssh/id_ed25519 kjh2064@178.104.200.7 "chmod +x /home/kjh2064/tmp/deploy.sh && /home/kjh2064/tmp/deploy.sh"
+          ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 kjh2064@178.104.200.7 "chmod +x /home/kjh2064/tmp/deploy.sh 2>/dev/null || true"
+          scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 tools/deploy_quantengine.sh kjh2064@178.104.200.7:/home/kjh2064/tmp/deploy.sh
+          ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ~/.ssh/id_ed25519 kjh2064@178.104.200.7 "chmod +x /home/kjh2064/tmp/deploy.sh && /home/kjh2064/tmp/deploy.sh"
 
       - name: Verify Public Routes
         run: |