Add excerpt about logging signal breaking changes (#4707)

* Add excerpt about logging signal breaking changes

* Update CHANGELOG.md

* Apply suggestions from code review

Co-authored-by: Emídio Neto <9735060+emdneto@users.noreply.github.com>
Co-authored-by: Jackson Weber <47067795+JacksonWeber@users.noreply.github.com>

* Apply suggestions from code review

* Apply suggestions from code review

---------

Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>
Co-authored-by: Emídio Neto <9735060+emdneto@users.noreply.github.com>
Co-authored-by: Jackson Weber <47067795+JacksonWeber@users.noreply.github.com>

Author: 4 people

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+**Breaking changes ongoing**
+
+> [!IMPORTANT]
+> We are working on stabilizing the Log signal that would require making deprecations and breaking changes. We will try to reduce the releases that may require an update to your code, especially for instrumentations or for sdk developers.
+
 ## Unreleased
 
 ## Version 1.36.0/0.57b0 (2025-07-29)

README.md

@@ -14,10 +14,15 @@ See the [OpenTelemetry Instrumentation for Python](https://opentelemetry.io/docs
 | ------- | ------------ | ------- |
 | Traces  | Stable       | N/A     |
 | Metrics | Stable       | N/A     |
-| Logs    | Experimental | N/A     |
+| Logs    | Development* | N/A     |
 
 Project versioning information and stability guarantees can be found [here](./rationale.md#versioning-and-releasing).
 
+***Breaking Changes**
+
+> [!IMPORTANT]
+> We are working on stabilizing the Log signal which would require making deprecations and breaking changes. We will try to reduce the releases that may require an update to your code, especially for instrumentations or for SDK developers.
+
 ## Getting started
 
 You can find the getting started guide for OpenTelemetry Python [here](https://opentelemetry.io/docs/instrumentation/python/getting-started/).