🧹 Fix unsafe any type in isObject parameter

Updates the type guard `isObject` in `src/core/json-utils.ts` to use `unknown` instead of `any` for its argument. This ensures better type safety without changing functionality.

Co-authored-by: zknpr <96851588+zknpr@users.noreply.github.com>

Author: google-labs-jules[bot]

src/core/json-utils.ts

@@ -104,6 +104,6 @@ export function applyMergePatch(target: any, patch: any, depth = 0): any {
     return target;
 }
 
-function isObject(val: any): boolean {
+function isObject(val: unknown): boolean {
     return val !== null && typeof val === 'object';
 }