feat: Refresh SDK custom-code seals after updater changes

Stainless-Generated-From: 959674773a75beaa802aca49638c53043f13ea1b

Author: kernel-internal[bot]

src/kernel/types/api_key.py

@@ -58,6 +58,12 @@ class APIKey(BaseModel):
     expires_at: Optional[datetime] = None
     """When the API key expires"""
 
+    last_used_at: Optional[datetime] = None
+    """
+    When the API key last authenticated a request, accurate to within about 20
+    minutes. Null if the key has not been used since last-use tracking began.
+    """
+
     masked_key: str
     """Masked version of the API key"""