opentelemetry-sampler-jaeger-remote: add support for Jaeger remote sampler

[herin049]

Description

Adds support for the Jaeger remote sampler.

Fixes #4774

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

uv run tox -e py314-test-sampler-jaeger-remote-latest

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[Copilot]

Pull request overview

Adds a new contrib package (opentelemetry-sampler-jaeger-remote) implementing the OpenTelemetry Jaeger remote sampler (per spec), including HTTP (protobuf-JSON) and gRPC providers, plus CI/test wiring to run the new package across the repo’s tox/GitHub Actions matrices.

Changes:

• Introduce the new opentelemetry-sampler-jaeger-remote package (sampler implementation, providers, vendored proto + generated bindings).
• Add unit tests and per-package test requirement locks (oldest/latest).
• Wire the package into the monorepo workspace, tox envs, and GitHub Actions test/lint workflows.

Reviewed changes

Copilot reviewed 35 out of 38 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
uv.lock	Adds the new sampler package to the uv workspace lock and dependency graph.
tox.ini	Adds tox test/lint envs and dependency wiring for the new sampler package.
scripts/jaeger_remote_proto_json_codegen.sh	Script to regenerate JSON codec code from the vendored proto.
scripts/jaeger_remote_proto_codegen.sh	Script to regenerate protobuf + gRPC Python bindings from the vendored proto.
sampler/opentelemetry-sampler-jaeger-remote/tests/test_samplers.py	Unit tests for sampler strategy implementations.
sampler/opentelemetry-sampler-jaeger-remote/tests/test_ratelimiter.py	Unit tests for token-bucket rate limiter behavior and thread-safety.
sampler/opentelemetry-sampler-jaeger-remote/tests/test_jaeger_remote_sampler.py	Unit tests for the polling sampler wrapper and lifecycle behavior.
sampler/opentelemetry-sampler-jaeger-remote/tests/test_http_provider.py	Unit tests for HTTP strategy provider behavior, retries, and decoding.
sampler/opentelemetry-sampler-jaeger-remote/tests/test_grpc_provider.py	Unit tests for gRPC strategy provider behavior, retries, and decoding.
sampler/opentelemetry-sampler-jaeger-remote/tests/init.py	Declares test package.
sampler/opentelemetry-sampler-jaeger-remote/test-requirements.oldest.txt	Locked “oldest” dependency set for tests.
sampler/opentelemetry-sampler-jaeger-remote/test-requirements.latest.txt	Locked “latest” dependency set for tests.
sampler/opentelemetry-sampler-jaeger-remote/test-requirements.in	Input requirements used to generate the locked test requirement files.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/version.py	Defines the package version.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/py.typed	Marks the package as typed for type checkers.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto/sampling_pb2.pyi	Generated mypy-protobuf stubs for the vendored sampling proto.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto/sampling_pb2.py	Generated protobuf runtime code for the vendored sampling proto.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto/sampling_pb2_grpc.py	Generated gRPC stubs for the vendored sampling proto.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto/init.py	Declares the protobuf module package.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto_json/sampling.py	Generated protobuf-JSON codec message types for HTTP decoding.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto_json/_json_codec.py	JSON codec helpers used by generated proto_json code.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto_json/init.py	Declares the proto_json module package.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/_samplers.py	Implements strategy-specific Sampler implementations.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/_ratelimiter.py	Implements a token bucket rate limiter used by samplers.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/_provider.py	Defines provider abstraction and strategy data structures.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/_http_provider.py	Implements HTTP strategy provider with retry/backoff and JSON decoding.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/_grpc_provider.py	Implements gRPC strategy provider with retry/backoff and decoding.
sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/init.py	Implements the polling JaegerRemoteSampler wrapper and provider selection.
sampler/opentelemetry-sampler-jaeger-remote/sampling.proto	Vendored Jaeger sampling.proto (with noted stripping) used for codegen.
sampler/opentelemetry-sampler-jaeger-remote/README.rst	Package readme and basic installation info.
sampler/opentelemetry-sampler-jaeger-remote/pyproject.toml	Package metadata, dependencies, and build configuration.
sampler/opentelemetry-sampler-jaeger-remote/gen-requirements.txt	Pinned generator tool deps for protobuf / JSON code generation.
pyproject.toml	Adds the new sampler package to the root workspace/dependencies and adjusts ruff excludes.
.pylintrc	Excludes generated proto_json directory from pylint scanning.
.github/workflows/test.yml	Adds CI jobs for sampler-jaeger-remote across Python versions and oldest/latest deps.
.github/workflows/lint.yml	Adds CI lint job for sampler-jaeger-remote.
.github/workflows/core_contrib_test.yml	Adds core+contrib integration test jobs for the new sampler package.
.changelog/4775.added	Adds changelog entry for the new sampler feature.

Files not reviewed (1)

• sampler/opentelemetry-sampler-jaeger-remote/src/opentelemetry/sampler/jaeger/remote/proto/sampling_pb2.py: Generated file