Python(chore): release prep (#564)

Author: alexluck-sift

python/CHANGELOG.md

@@ -3,6 +3,24 @@ All notable changes to this project will be documented in this file.
 
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [v0.16.0] - May 14, 2026
+
+### What's New
+#### Description, Metadata, and Associated Channels on Test Measurements
+`TestMeasurementCreate` and `TestMeasurementUpdate` now accept `description`, `metadata`, and `channel_names` to attach contextual information and link measurements to the channels they were derived from. `channel_names` accepts either channel name strings or `Channel` objects. Descriptions longer than 2000 characters are truncated with a warning to match the server-side limit.
+
+#### Metadata on Test Steps
+`TestStepCreate` and `TestStepUpdate` now accept a `metadata` dict so test steps can carry structured key/value context the same way reports and measurements do. The `ReportContext.new_step` / `create_step` and `NewStep.substep` helpers in the test-results context manager forward a new `metadata` kwarg through to the created step.
+
+### Bugfixes
+- Pass the configured log file through to test result update calls so update events are written to the `.jsonl` log alongside create events. ([#560](https://github.com/sift-stack/sift/pull/560))
+
+### Full Changelog
+- [Update protos](https://github.com/sift-stack/sift/pull/559)
+- [Fix log not being passed with update calls](https://github.com/sift-stack/sift/pull/560)
+- [Add metadata, description, and associated channel support to measurements](https://github.com/sift-stack/sift/pull/561)
+- [Add step metadata support](https://github.com/sift-stack/sift/pull/563)
+
 ## [v0.15.0] - May 7, 2026
 
 ### What's New

python/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "sift_stack_py"
-version = "0.15.0"
+version = "0.16.0"
 description = "Python client library for the Sift API"
 requires-python = ">=3.8"
 readme = { file = "README.md", content-type = "text/markdown" }