Document CommitStatus structure in context variables

[vim-zz]

✨ PR Description

Purpose: Add documentation for the CommitStatus structure in gitStream's context variables to enable integration with external CI systems.
Main changes:

• Added pr.commit_statuses field to the context variables table with GitHub-specific tag
• Created CommitStatus structure documentation with fields, description and JSON example
• Added note about gitStream's behavior regarding commit status events collection

Generated by LinearB AI and added by gitStream.
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[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

[MishaKav]

Lg

Review dismissed

[gitstream-cm]

✨ PR Review

The PR adds clear documentation for the CommitStatus structure, which improves the context variables reference. However, there's an inconsistency in the example that should be corrected.

1 issues detected:

🧾 Readability - The example data contains logically inconsistent values that don't represent a realistic commit status. 🛠️

Details: The example shows a commit status with state "pending" but description "The build succeeded!" which is contradictory. A pending state should not indicate success, as this could mislead users about what valid data looks like.
File: docs/context-variables.md (388-388)
_{🛠️ A suggested code correction is included in the review comments.}

Generated by LinearB AI and added by gitStream.
_{AI-generated content may contain inaccuracies. Please verify before using.
💡 Tip: You can customize your AI Review using Guidelines Learn how}

[gitstream-cm]

🧾 Readability - Inconsistent Example: Change either the state to "success" to match the description, or change the description to something like "Build in progress..." to match the pending state.

Suggested change

	"state": "pending",
	"state": "success",

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