Add example for enabling AI actions on draft PRs

[vim-zz]

✨ PR Description

Purpose: Add documentation example for enabling AI actions like code-review on draft PRs with explicit triggers.

Main changes:

• Added YAML+Jinja configuration example for running AI actions on draft PRs
• Clarified that AI actions don't run on draft PRs by default
• Added explanation of the developer benefit for getting AI feedback during coding process

Generated by LinearB AI and added by gitStream.
_{AI-generated content may contain inaccuracies. Please verify before using. We'd love your feedback! 🚀}

[orca-security-us]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[gitstream-cm]

Please mark which AI tools you used for this PR by checking the appropriate boxes:

• GitHub Copilot
• Cursor
• ChatGPT
• Tabnine
• JetBrains AI Assistant
• VSCode IntelliCode
• Claude
• Gemini
• Other AI tool
• No AI tools were used

Tip: If you want to avoid this comment in the future, you can add a label of the format 🤖 ai-* when creating your PR.

[gitstream-cm]

✨ PR Review

The PR adds a helpful documentation example for enabling AI actions on draft PRs. The YAML configuration appears syntactically correct and the explanation is clear.

1 issues detected:

🧹 Maintainability - Users on GitLab/Bitbucket platforms may try this configuration and encounter errors without being warned about the limitation.

Details: The new example uses explicit triggers (on: pr_created, commit) but doesn't mention the platform limitation warning that appears earlier in the document, which states that explicit triggers are only supported on GitHub and will cause errors on GitLab and Bitbucket.
File: docs/execution-model.md

Generated by LinearB AI and added by gitStream.
_{AI-generated content may contain inaccuracies. Please verify before using. We'd love your feedback! 🚀}