docs: use Google-style docstring for check_venom_ctx

[augmentcode]

Problem

• Align check_venom_ctx's documentation with the requested Google docstring style.

Solution

• Add a Google-style docstring that documents the context argument and the ExceptionGroup raised on semantic validation failures.

Misc

• This was a manual session, but only github-app-api was available, so PR creation/comment attribution uses the bot identity.

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Pull Request opened by Augment Code | View session

[augmentcode]

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[augmentcode]

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Review completed with 1 suggestions.

[augmentcode]

The docstring uses Google-style format (Args:, Raises:), but Vyper follows NumPy docstring style per docs/style-guide.rst line 241; use Parameters with ---------- underline instead of Args:, and format Raises as a structured section with ------ if needed (see vyper/ast/nodes.py lines 242-247 for reference).

Severity: medium

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[augmentcode]

^{PR Author Agent⚡}

Thanks — I'm leaving this as Google style because this PR was explicitly requested to convert this docstring to Google format. If the desired outcome changes to repo-standard NumPy style instead, I can revise it then.

[augmentcode]

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