Wrap gh API calls in ErrorActionPreference Continue

[Finesssee]

Summary

• wrap all gh CLI invocations in Get-Release, Invoke-GhJson, and Invoke-GhUpload with try/finally ErrorActionPreference=Continue
• gh writes errors to stderr (e.g. HTTP 404 when querying a non-existent release); with script-level ErrorActionPreference=Stop, stderr triggers a terminating error before LASTEXITCODE can be checked

Root cause

Pipeline #40: gh was found and invoked successfully. Get-Release queried repos/nesszer/Win-CodexBar/releases/tags/v0.49.2 and got HTTP 404 (no release exists yet). gh wrote the 404 to stderr, and ErrorActionPreference=Stop threw immediately instead of checking the 404 and returning null to create a new draft release.

Validation

• release-pipeline.tests.ps1 passed
• circleci config validate passed
• no version files changed