ci: Add SSH key debug logging

Author: imaNNeo

.github/workflows/deploy.yml

@@ -37,7 +37,17 @@ jobs:
           SSH_PATH="$HOME/.ssh"
           mkdir -p "$SSH_PATH"
           touch "$SSH_PATH/known_hosts"
+
           echo "$PRIVATE_KEY" > "$SSH_PATH/id_rsa"
+
+          echo "--- Debug: key file size ---"
+          wc -c "$SSH_PATH/id_rsa"
+          echo "--- Debug: first/last lines ---"
+          head -1 "$SSH_PATH/id_rsa"
+          tail -1 "$SSH_PATH/id_rsa"
+          echo "--- Debug: file type ---"
+          file "$SSH_PATH/id_rsa"
+
           chmod 700 "$SSH_PATH"
           ssh-keyscan github.com >> ~/.ssh/known_hosts
           chmod 600 "$SSH_PATH/known_hosts"