fix: disambiguate Scratch thread context overloads

[oco777]

Summary

• ensure Scratch thread context lookups specify string-based out parameters where needed
• enforce Guid-based thread retrieval in stop control units to avoid overload ambiguity
• document the Guid-based context usage for Scratch stop units

Testing

• dotnet build (fails: dotnet CLI not available in container)

---

Codex Task

[chatgpt-codex-connector]

💡 Codex Review

FUnity/Runtime/Integrations/VisualScripting/Units/ScratchUnits/StopControlUnits.cs

Lines 67 to 69 in d82afe5

	if (ScratchUnitUtil.TryGetThreadContext(flow, out _, out Guid threadId))
	{
	FUnityScriptThreadManager.Instance.StopThread(threadId);

Import System for Guid usage in stop units

Both stop units now declare Guid threadId, but this file does not import System, so Guid is undefined and the file will not compile. Any build that touches these units will fail until System.Guid is referenced (e.g., via using System; or full qualification).

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".