feat: telegram draft streaming

src/gateway/server-bridge.ts

@@ -446,7 +446,7 @@ export function createBridgeHandlers(ctx: BridgeHandlersContext) {
                   ok: false,
                   error: {
                     code: ErrorCodes.INVALID_REQUEST,
-                    message: `invalid reasoningLevel: ${String(raw)}`,
+                    message: `invalid reasoningLevel: ${String(raw)} (use on|off|stream)`,
                   },
                 };
               }

src/gateway/server-methods/sessions.ts

@@ -224,7 +224,7 @@ export const sessionsHandlers: GatewayRequestHandlers = {
             undefined,
             errorShape(
               ErrorCodes.INVALID_REQUEST,
-              'invalid reasoningLevel (use "on"|"off")',
+              'invalid reasoningLevel (use "on"|"off"|"stream")',
             ),
           );
           return;