feat(go): add ContentCaptureMode for SDK-level content stripping #56

Job	Run time
.NET SDK	54s
Go SDK	1m 10s
TypeScript SDK	23s
Python SDK (anthropic, uv run --with './python[dev]' --with './python-providers/anthropic[dev]' p...	11s
Python SDK (gemini, uv run --with './python[dev]' --with './python-providers/gemini[dev]' pytest ...	11s
Python SDK (core, uv run --with '.[dev]' --directory python pytest tests)	25s
Python SDK (langgraph, uv run --with './python[dev]' --with './python-frameworks/langgraph[dev]' ...	12s
Python SDK (google-adk, uv run --with './python[dev]' --with './python-frameworks/google-adk[dev]...	26s
Python SDK (openai-agents, uv run --with './python[dev]' --with './python-frameworks/openai-agent...	17s
Python SDK (openai, uv run --with './python[dev]' --with './python-providers/openai[dev]' pytest ...	11s
Python SDK (llamaindex, uv run --with './python[dev]' --with './python-frameworks/llamaindex[dev]...	14s
Python SDK (litellm, uv run --with './python[dev]' --with './python-frameworks/litellm[dev]' pyte...	15s
Java SDK	1m 32s
Python SDK (langchain, uv run --with './python[dev]' --with './python-frameworks/langchain[dev]' ...	12s
	6m 33s

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