Add null to log componentPath typing (#29662)

`componentPath` on `FunctionExecutionProgress` can be null.

GitOrigin-RevId: d9942b48ae85629207251f4752f7c49f664b3f16

Author: atrakh

npm-packages/system-udfs/convex/_system/frontend/common.ts

@@ -54,7 +54,7 @@ export type FunctionExecutionCompletion = {
 
 export type FunctionExecutionProgess = {
   kind: "Progress";
-  componentPath?: string;
+  componentPath?: string | null;
   identifier: string;
   udfType: UdfType;
   // Unix timestamp (in seconds)