fix(assistants): handle thread.run.incomplete event

Author: RobertCraigie

src/lib/AssistantStream.ts

@@ -370,6 +370,7 @@ export class AssistantStream
       case 'thread.run.in_progress':
       case 'thread.run.requires_action':
       case 'thread.run.completed':
+      case 'thread.run.incomplete':
       case 'thread.run.failed':
       case 'thread.run.cancelling':
       case 'thread.run.cancelled':
@@ -400,6 +401,8 @@ export class AssistantStream
         throw new Error(
           'Encountered an error event in event processing - errors should be processed earlier',
         );
+      default:
+        assertNever(event);
     }
   }
 
@@ -772,3 +775,5 @@ export class AssistantStream
     return await this._createToolAssistantStream(runs, threadId, runId, params, options);
   }
 }
+
+function assertNever(_x: never) {}