feat: Expose browser_session_id on managed auth connection

Author: stainless-app[bot]

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 112
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/kernel%2Fkernel-686a9addd4f9356ca26ff3ff04e1a11466d77a412859829075566394922b715d.yml
-openapi_spec_hash: 7a9e9c2023400d44bcbfb87b7ec07708
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/kernel%2Fkernel-e14974fd90680e5745b35d8718a1ccce2181f6d17a6e0a1fd35fc5bca88795ae.yml
+openapi_spec_hash: 1b3aa75f0ab48b122d514047f9c82873
 config_hash: 08d55086449943a8fec212b870061a3f

src/kernel/types/auth/managed_auth.py

@@ -157,6 +157,13 @@ class ManagedAuth(BaseModel):
     - Ping Identity: _.pingone.com, _.pingidentity.com
     """
 
+    browser_session_id: Optional[str] = None
+    """
+    ID of the underlying browser session driving the current flow (present when flow
+    in progress). Use this to inspect or terminate the browser session via the
+    `/browsers` API.
+    """
+
     can_reauth: Optional[bool] = None
     """
     Whether automatic re-authentication is possible (has credential, selectors, and