fix(app): Normalize provisioning templates and Clerk props

Use autoescape for Jinja rendering to satisfy bandit checks and\nremove deprecated Clerk SignInButton props to restore type checks.\nAlso ignore tsbuildinfo artifacts and tidy boot instructions.\n\nCo-Authored-By: Claude <noreply@anthropic.com>

backend/app/services/agent_provisioning.py

@@ -4,7 +4,7 @@ import re
 from pathlib import Path
 from uuid import uuid4
 
-from jinja2 import Environment, FileSystemLoader, StrictUndefined
+from jinja2 import Environment, FileSystemLoader, StrictUndefined, select_autoescape
 
 from app.core.config import settings
 from app.integrations.openclaw_gateway import ensure_session, send_message
@@ -38,7 +38,7 @@ def _slugify(value: str) -> str:
 def _template_env() -> Environment:
     return Environment(
         loader=FileSystemLoader(_templates_root()),
-        autoescape=False,
+        autoescape=select_autoescape(default=True),
         undefined=StrictUndefined,
         keep_trailing_newline=True,
     )