fix(fred): Add User-Agent header to fred_proxy_get

urllib omits the User-Agent header by default, which triggers Cloudflare's
bot-detection rule 1010 and blocks the request. Adding any non-empty value
satisfies the check.

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

Author: bison

skills/fred/SKILL.md

@@ -22,7 +22,7 @@ token = os.environ["OPENROUTER_API_KEY"]
 def fred_proxy_get(path: str, params: dict | None = None) -> dict:
     query = urllib.parse.urlencode({"file_type": "json", **(params or {})})
     url = f"{base.rstrip('/')}/{path.lstrip('/')}?{query}"
-    req = urllib.request.Request(url, headers={"Authorization": f"Bearer {token}"})
+    req = urllib.request.Request(url, headers={"Authorization": f"Bearer {token}", "User-Agent": "opencode-fred-client/1.0"})
     with urllib.request.urlopen(req, timeout=20) as resp:
         return json.loads(resp.read().decode())
 ```