Bump @linearb/gitstream-core to 2.1.234

[linearbci]

✨ PR Description

Purpose: Fix error handling in RuleParser to preserve accurate payload size information when handling large PR requests that exceed size limits.

Main changes:

• Modified error detection logic to distinguish between client-side and backend 413 errors using message content
• Preserved original error message with correct size calculation when error originates from client-side validation
• Added comprehensive test suite covering size calculation, error flow simulation, and fix verification scenarios

CHANGELOG

🐛 Bug Fixes

• Fixed incorrect payload size reporting in error messages for oversized PR requests

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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