Merge pull request #1778 from rahulsamant37:fix/event-id-uuid4-collision-v1

PiperOrigin-RevId: 779177848

Author: copybara-github

src/google/adk/events/event.py

@@ -14,9 +14,8 @@
 from __future__ import annotations
 
 from datetime import datetime
-import random
-import string
 from typing import Optional
+import uuid
 
 from google.genai import types
 from pydantic import alias_generators
@@ -132,5 +131,4 @@ def has_trailing_code_execution_result(
 
   @staticmethod
   def new_id():
-    characters = string.ascii_letters + string.digits
-    return ''.join(random.choice(characters) for _ in range(8))
+    return str(uuid.uuid4())