[aikins01]

The bedrock, google-genai, litellm and openrouter integrations now call SpanHandle.capture_masked, SpanHandle.record_output_chunk and SpanHandle.capture_output directly, and bedrock reads Client.mask directly, the way anthropic and openai already do. The getattr fallbacks they replace were written for cores without these members, but every integration requires telemetry-dev>=0.3.0, and the published 0.3.0 wheel has all four. This settles the Python compatibility item in #83.

Behavior doesn't change. With 0.3.0 from PyPI, a handle from a disabled client reports capture_masked and capture_output as false and accepts record_output_chunk. A handle from a client with a mask reports capture_masked as true. The fallbacks for CaptureBudget.for_stream, CaptureBudget.reserve_bytes and prompt_attributes_for stay, because 0.3.0 doesn't have those.

Refs #83