Address remaining PR feedback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

dotnet/test/SessionFsTests.cs

@@ -125,8 +125,9 @@ public async Task Should_Reject_SetProvider_When_Sessions_Already_Exist()
                 {
                     await client2.ForceStopAsync();
                 }
-                catch (IOException)
+                catch (IOException ex)
                 {
+                    Console.Error.WriteLine($"Ignoring expected teardown IOException from ForceStopAsync: {ex.Message}");
                 }
             }
         }

python/copilot/__init__.py

@@ -17,13 +17,15 @@
     CommandContext,
     CommandDefinition,
     CopilotSession,
+    CreateSessionFsHandler,
     ElicitationContext,
     ElicitationHandler,
     ElicitationParams,
     ElicitationResult,
     InputOptions,
     SessionCapabilities,
     SessionFsConfig,
+    SessionFsHandler,
     SessionUiApi,
     SessionUiCapabilities,
 )
@@ -36,6 +38,7 @@
     "CommandDefinition",
     "CopilotClient",
     "CopilotSession",
+    "CreateSessionFsHandler",
     "ElicitationHandler",
     "ElicitationParams",
     "ElicitationContext",
@@ -48,6 +51,7 @@
     "ModelVisionLimitsOverride",
     "SessionCapabilities",
     "SessionFsConfig",
+    "SessionFsHandler",
     "SessionUiApi",
     "SessionUiCapabilities",
     "SubprocessConfig",