feat(ai): add claude code agents sdk integration

[shellmayr]

Add instrumentation for the claude-agent-sdk package, which provides
a Python interface to interact with Claude Code CLI.

The integration captures:

• gen_ai.system: "claude-agent-sdk-python"
• gen_ai.operation.name: "chat"
• gen_ai.request.model / gen_ai.response.model
• gen_ai.request.messages (when PII enabled)
• gen_ai.response.text (when PII enabled)
• gen_ai.request.available_tools
• gen_ai.response.tool_calls
• gen_ai.usage.input_tokens / output_tokens / total_tokens
• gen_ai.usage.input_tokens.cached

Instrumented methods:

• query() async generator function for one-shot queries
• ClaudeSDKClient.query() and receive_response() for interactive sessions

Closes TET-1743
Co-Authored-By: Claude Sonnet 4.5 noreply@anthropic.com

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

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New Features ✨

• feat(ai): add claude code agents sdk integration by shellmayr in #5316

• feat(anthropic): Set system instruction attribute by alexander-alderman-webb in #5353
• feat(google-genai): Set system instruction attribute by alexander-alderman-webb in #5354
• feat(langchain): Set system instruction attribute by alexander-alderman-webb in #5357
• feat(openai-agents): Set system instruction attribute by alexander-alderman-webb in #5355
• feat(pydantic-ai): Set system instruction attribute by alexander-alderman-webb in #5356

Internal Changes 🔧

• ci(release): Fix changelog-preview permissions by BYK in #5368
• ci: Fix path in AI integration tests by alexander-alderman-webb in #5347

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_{🤖 This preview updates automatically when you update the PR.}

[constantinius]

Excited about this!
Additional things we could capture:

• gen_ai.agent.name for subagents (https://platform.claude.com/docs/en/agent-sdk/python#agent-definition)
• gen_ai.conversation.id from the session_id (https://platform.claude.com/docs/en/agent-sdk/sessions)

[linear]

TET-1743 Create SDK integration for Claude Agent SDK in Python