Regenerate opentelemetry-proto code with v1.9.0 release (open-telemetry#4840)

Fixes open-telemetry#4804

I also simplified the script to use uv to manage deps

Author: aabmass

CHANGELOG.md

@@ -12,6 +12,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Regenerate opentelemetry-proto code with v1.9.0 release
+  ([#4840](https://github.com/open-telemetry/opentelemetry-python/pull/4840))
+
 ## Version 1.39.0/0.60b0 (2025-12-03)
 
 - `opentelemetry-api`: Convert objects of any type other than AnyValue in attributes to string to be exportable

opentelemetry-proto/README.rst

@@ -7,9 +7,9 @@ OpenTelemetry Python Proto
    :target: https://pypi.org/project/opentelemetry-proto/
 
 This library contains the generated code for OpenTelemetry protobuf data model. The code in the current
-package was generated using the v1.7.0 release_ of opentelemetry-proto.
+package was generated using the v1.9.0 release_ of opentelemetry-proto.
 
-.. _release: https://github.com/open-telemetry/opentelemetry-proto/releases/tag/v1.7.0
+.. _release: https://github.com/open-telemetry/opentelemetry-proto/releases/tag/v1.9.0
 
 Installation
 ------------