Bump @linearb/gitstream-core to 2.1.258

[linearbci]

✨ PR Description

Purpose: Optimize AI request execution by parallelizing code review and change description processing across all automations simultaneously.

Main changes:

• Changed execution model from sequential per-automation to parallel across all automations for AI requests
• Switched from Promise.all to Promise.allSettled to enable partial success when individual automations fail
• Separated AI request processing phase from subsequent async function rendering phase for better performance

CHANGELOG

🔧 Improvements

• Automation rule processing now runs faster by handling multiple requests simultaneously

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[MishaKav]

LG

[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