Bump @linearb/gitstream-core to 2.1.255

[linearbci]

✨ PR Description

Purpose: Add installation identifier to AI context for improved tracking and authentication across GitHub app installations.

Main changes:

• Added installationId field to LinearbAIContext interface and exported LinearbAIContext type from main index
• Updated getLinearbAIContext function to include installationId from payload in context object
• Modified module exports to include LinearbAIContext alongside existing LinearbAIRequestData type

CHANGELOG

🔧 Improvements

• Enhanced AI context with installation tracking for better service integration

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

[orca-security-us]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	OSS Licenses	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