Add changelog entry

Author: timfel

CHANGELOG.md

@@ -18,6 +18,7 @@ language runtime. The main focus is on user-observable behavior of the engine.
 * Added support for specifying generics on foreign classes, and inheriting from such classes. Especially when using Java classes that support generics, this allows expressing the generic types in Python type annotations as well.
 * Added a new `java` backend for the `pyexpat` module that uses a Java XML parser instead of the native `expat` library. It can be useful when running without native access or multiple-context scenarios. This backend is the default when embedding and can be switched back to native `expat` by setting `python.PyExpatModuleBackend` option to `native`. Standalone distribution still defaults to native expat backend.
 * Add a new context option `python.UnicodeCharacterDatabaseNativeFallback` to control whether the ICU database may fall back to the native unicode character database from CPython for features and characters not supported by ICU. This requires native access to be enabled and is disabled by default for embeddings.
+* Add an experimental `python.InitializationEntropySource` option to control the entropy source used for initialization-only randomness such as hash secret generation and `random.Random(None)` seeding. This means embeddings and tests can select deterministic or externally provided initialization entropy without affecting cryptographically relevant APIs like `os.urandom()` or `random.SystemRandom()`.
 * Foreign temporal objects (dates, times, and timezones) are now given a Python class corresponding to their interop traits, i.e., `date`, `time`, `datetime`, or `tzinfo`. This allows any foreign objects with these traits to be used in place of the native Python types and Python methods available on these types work on the foreign types.
 
 ## Version 25.0.1