Python(chore): add pinning recommendation (#415)

Author: alexluck-sift

python/docs/index.md

@@ -34,6 +34,8 @@ Browse the [**Sift Py API**][sift_py] section for complete reference documentati
 !!! warning
     The Sift Client is experimental and is subject to change.
 
+    To avoid unexpected breaking changes, pin the exact version of the `sift-stack-py` library in your dependencies (for example, in `requirements.txt` or `pyproject.toml`).
+
 
 The modern, high-level client library that provides all the ergonomic features missing from the original API. This new client offers intuitive Python interfaces, strong type safety, automatic connection management, and both synchronous and asynchronous support. 
 

python/lib/sift_client/__init__.py

@@ -3,6 +3,9 @@
 !!! warning
     The Sift Client is experimental and is subject to change.
 
+    To avoid unexpected breaking changes, pin the exact version of the `sift-stack-py` library in your dependencies (for example, in `requirements.txt` or `pyproject.toml`).
+
+
 ## Overview
 
 This library provides a high-level Python client for interacting with Sift APIs. It offers:

python/lib/sift_client/client.py

@@ -49,6 +49,8 @@ class SiftClient(
     !!! warning
         The Sift Client is experimental and is subject to change.
 
+        To avoid unexpected breaking changes, pin the exact version of the `sift-stack-py` library in your dependencies (for example, in `requirements.txt` or `pyproject.toml`).
+
     Examples:
         from sift_client import SiftClient
         from datetime import datetime