fix: normalize deploy shell scripts to LF for Linux curl|bash

CRLF line endings broke manage.sh on Ubuntu (set -e and function syntax errors).
Add .gitattributes to keep *.sh on LF in git.

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/bootstrap.sh

@@ -1,5 +1,5 @@
-#!/usr/bin/env bash
-# 兼容入口：转发到 manage.sh
-set -euo pipefail
-ROOT="$(cd "$(dirname "$0")/.." && pwd)"
-exec bash "${ROOT}/deploy/manage.sh" "$@"
+#!/usr/bin/env bash
+# 兼容入口：转发到 manage.sh
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+exec bash "${ROOT}/deploy/manage.sh" "$@"