fix: Keep dynamic code valid in Windows PowerShell 5.1

[hatayama]

Summary

• Windows PowerShell 5.1 now preserves escaped C# quotation marks when it invokes native uloop commands.
• Existing Windows paths and trailing backslashes retain their intended values.

User Impact

• Multiline dynamic C# code containing escaped quotes no longer fails with CS1009 under Windows PowerShell 5.1.
• PowerShell 7 behavior remains unchanged.

Changes

• Apply the Windows argv backslash rules in the three Windows E2E script entry points.
• Add a Windows PowerShell regression test for escaped quotes, trailing backslashes, Windows paths, and Japanese text; run it in Windows CI.
• The Save-EventLog C# string-literal escaping is intentionally unchanged because it is not process argv encoding.

Verification

• PowerShell 5.1 and pwsh 7 regression script passed.
• Multiline execute-dynamic-code passed through both hosts using the repo-local Windows CLI.
• Release-automation workflow tests passed.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 120eb9f9-5ad4-4e67-8d45-21f026eda53c

📥 Commits

Reviewing files that changed from the base of the PR and between 4ace5b4 and 914a710.

⛔ Files ignored due to path filters (4)

• Assets/Tests/Demo/scripts/verify-replay-via-cli.ps1 is excluded by none and included by none
• scripts/run-windows-e2e.ps1 is excluded by none and included by none
• scripts/test-powershell51-native-argument-escaping.ps1 is excluded by none and included by none
• scripts/test-simulate-mouse-demo.ps1 is excluded by none and included by none

📒 Files selected for processing (1)

• .github/workflows/build-and-test.yml

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📝 Walkthrough

Walkthrough

The Windows CI workflow now preloads additional verification scripts and adds a dedicated PowerShell 5.1 native argument escaping test step.

Changes

Windows PowerShell CI

Layer / File(s)	Summary
PowerShell script loading and validation .github/workflows/build-and-test.yml	The Windows workflow preloads additional E2E, demo, CLI replay, and argument escaping scripts, then runs the PowerShell 5.1 native argument escaping test.

Estimated code review effort: 2 (Simple) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly reflects the main change: preserving valid dynamic code in Windows PowerShell 5.1.
Description check	✅ Passed	The description is detailed and directly matches the Windows PowerShell 5.1 argument-handling and regression test changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/powershell51-argv-escaping

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