feat(vultr-vps): add render_backend_tf.py for S3-compatible remote state

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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

terraform-hcl-standard/vultr-vps/scripts/render_backend_tf.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+"""
+渲染 Terraform S3 backend 配置文件（backend.tf）。
+
+用法：
+  TF_STATE_ENDPOINT=https://... python3 render_backend_tf.py [output_path]
+
+默认输出到当前目录的 backend.tf（在 terraform working-directory 里执行）。
+"""
+import os
+import sys
+
+endpoint = os.environ.get("TF_STATE_ENDPOINT", "")
+if not endpoint:
+    print("ERROR: TF_STATE_ENDPOINT is not set", file=sys.stderr)
+    sys.exit(1)
+
+output = sys.argv[1] if len(sys.argv) > 1 else "backend.tf"
+
+content = f"""\
+terraform {{
+  backend "s3" {{
+    endpoints                   = {{ s3 = "{endpoint}" }}
+    skip_credentials_validation = true
+    skip_region_validation      = true
+    skip_requesting_account_id  = true
+    skip_metadata_api_check     = true
+    skip_s3_checksum            = true
+    use_path_style              = true
+  }}
+}}
+"""
+
+with open(output, "w") as f:
+    f.write(content)
+
+print(f"backend.tf written to {output}")
+print(f"  endpoint = {endpoint[:40]}...")