feat: update README.md and solving Python compatibility issues

agent/memory/chunker.py

@@ -4,6 +4,7 @@ Text chunking utilities for memory
 Splits text into chunks with token limits and overlap
 """
 
+from __future__ import annotations
 from typing import List, Tuple
 from dataclasses import dataclass
 

agent/memory/config.py

@@ -4,6 +4,7 @@ Memory configuration module
 Provides global memory configuration with simplified workspace structure
 """
 
+from __future__ import annotations
 import os
 from dataclasses import dataclass, field
 from typing import Optional, List

agent/memory/storage.py

@@ -4,6 +4,7 @@ Storage layer for memory using SQLite + FTS5
 Provides vector and keyword search capabilities
 """
 
+from __future__ import annotations
 import sqlite3
 import json
 import hashlib