fix: use unique workspace per command execution (fixes #1114)

[kagura-agent]

Summary

Fix concurrent commands for the same site failing with Detached while handling command.

Closes #1114

Root Cause

Browser command execution uses a workspace key based only on site name (site:${cmd.site}). When two commands for the same site run concurrently, they share the same browser session. If one finishes first and calls page.closeWindow(), the other command's page is detached mid-execution.

Fix

Append crypto.randomUUID() to the workspace key so each command gets its own isolated browser session:

// Before
workspace: \`site:\${cmd.site}\`

// After  
workspace: \`site:\${cmd.site}:\${crypto.randomUUID()}\`

Testing

• All 1767 existing tests pass
• npx tsc --noEmit clean
• Surgical 1-line change in src/execution.ts

[Henry-G-H-Huang]

any update about this PR ?

[kagura-agent]

Hi @Henry-G-H-Huang — thanks for the ping! The PR is still up to date and mergeable. Waiting on maintainer review. Let me know if there's anything I can help with!

[kagura-agent]

@jackwener Friendly ping — the issue reporter has asked about this a few times now. The PR is clean and ready to merge whenever you have a moment. Thanks! 🙏

[kagura-agent]

@jackwener Third ping — the issue reporter has asked about this multiple times. The fix is mergeable and ready. If this doesn't align with your plans, I'm happy to close it. Just let me know. 🙏