Release v0.1.6

[marcleblanc2]

Summary

• expose SourcegraphClient.graphql pagination controls for callers that need to own cursor handling
• add coverage for disabling automatic GraphQL pagination
• bump src-py-lib package metadata to 0.1.6

Validation

• uv lock --check
• actionlint
• npx --yes markdownlint-cli2@0.22.1
• uv run ruff check .
• uv run ruff format --check .
• uv run pyright
• uv run python -m unittest discover -s tests
• uv build --wheel --sdist --out-dir /tmp/src-py-lib-release-check --no-create-gitignore