fix: Prevent double-prefixing of S2A team names and refactor Telegram bot's thread pool usage for non-blocking execution.

s2a_service.py

@@ -710,7 +710,7 @@ def s2a_create_account_from_oauth(
     full_email = name if "@" in name else ""
 
     if name:
-        payload["name"] = f"team-{name}"
+        payload["name"] = name if name.startswith("team-") else f"team-{name}"
     if proxy_id is not None:
         payload["proxy_id"] = proxy_id
 
@@ -790,8 +790,9 @@ def s2a_add_account(
     if token_info.get("email"):
         credentials["email"] = token_info.get("email")
 
+    s2a_name = name if name.startswith("team-") else f"team-{name}"
     payload = {
-        "name": f"team-{name}",
+        "name": s2a_name,
         "platform": "openai",
         "type": "oauth",
         "credentials": credentials,