fix: use rsync to clean stale files during host volume sync

.gitea/workflows/deploy.yml

@@ -16,9 +16,9 @@ jobs:
         run: |
           if command -v apt-get &> /dev/null; then
             apt-get update
-            apt-get install -y nodejs git openjdk-21-jdk
+            apt-get install -y nodejs git openjdk-21-jdk rsync
           elif command -v apk &> /dev/null; then
-            apk add --no-cache nodejs git openjdk21
+            apk add --no-cache nodejs git openjdk21 rsync
           fi
 
       - name: Checkout Code
@@ -26,8 +26,13 @@ jobs:
 
       - name: Sync Code to Host Volume
         run: |
-          echo "Copying latest code to /app (Host Volume)..."
-          cp -a . /app/
+          echo "Copying latest code to /app (Host Volume) and removing stale files..."
+          if command -v rsync &> /dev/null; then
+            rsync -a --delete --exclude='.git' . /app/
+          else
+            rm -rf /app/dap-* /app/src /app/build.gradle /app/settings.gradle
+            cp -a . /app/
+          fi
 
       - name: Deploy Task on Host
         run: |