[AI-FSSDK] [FSSDK-13070] prepare for release python v5.7.0 (#523)

* [FSSDK-13070] update CHANGELOG for python v5.7.0

* [FSSDK-13070] bump version to 5.7.0

Author: junaed-optimizely

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Optimizely Python SDK Changelog
 
+## 5.7.0
+September 2nd, 2026
+
+### New Features
+
+**Holdout Targeted Delivery Exclusion**: Holdouts can now be configured to exclude Targeted Delivery rules, so users held out of experiments still receive their Targeted Delivery experiences. This gives you a cleaner measure of experiment impact without holding users back from ongoing rollouts.
+
+- Add holdout exclusion logic for Targeted Delivery rules ([#522](https://github.com/optimizely/python-sdk/pull/522))
+
+---
+
 ## 5.6.0
 July 10th, 2026
 

optimizely/version.py

@@ -11,5 +11,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-version_info = (5, 6, 0)
+version_info = (5, 7, 0)
 __version__ = '.'.join(str(v) for v in version_info)