fix(core): improve cache retrieval in InMemoryDriver

- Enhanced the get method to parse JSON values from the cache, returning null for missing keys.
- Added error handling to ensure non-JSON values are returned correctly.

Author: vinayak25

packages/core/lib/cache/drivers/inMemory.ts

@@ -11,8 +11,13 @@ export class InMemoryDriver implements CacheDriver {
 
   async get<T>(key: string): Promise<T> {
     await this.initialiseModules();
-    const cacheKey = `${this.options.prefix}:::${key}`;
-    return this.client.get(cacheKey);
+    const value = await this.client.get(`${this.options.prefix}:::${key}`);
+    if (!value) return null;
+    try {
+      return JSON.parse(value);
+    } catch (e) {
+      return value;
+    }
   }
 
   async set(