Fix broken db operation for raw bytes

src/database.service.ts

@@ -73,10 +73,14 @@ export default class Database {
    * Get a single object from a store
    * O(log n) operation - only reads specific key
    */
-  public async getObject(storeName: string, key: string): Promise<any | null> {
+  public async getObject(storeName: string, key: string, isBuffer: boolean = false): Promise<any | null> {
     try {
       const fullKey = this.getKey(storeName, key);
-      return await this.db.get(fullKey);
+      if (isBuffer) {
+        return await this.db.get(fullKey, { valueEncoding: 'buffer' });
+      } else {
+        return await this.db.get(fullKey);
+      }
     } catch (error) {
       if ((error as any).code === 'LEVEL_NOT_FOUND') {
         return null;
@@ -89,12 +93,16 @@ export default class Database {
    * Add or update an object in a store
    * O(log n) operation - only writes specific key-value pair
    */
-  public async addObject(operation: DatabaseObject): Promise<void> {
+  public async addObject(operation: DatabaseObject, isBuffer: boolean = false): Promise<void> {
     const { storeName, object, key } = operation;
     
     if (key) {
       const fullKey = this.getKey(storeName, key);
-      await this.db.put(fullKey, object);
+      if (isBuffer) {
+        await this.db.put(fullKey, object, { valueEncoding: 'buffer' });
+      } else {
+        await this.db.put(fullKey, object);
+      }
     } else {
       // Auto-generate key if none provided
       const autoKey = Date.now().toString() + Math.random().toString(36).substr(2, 9);