[Bug]: PR Base is from wrong branch

[jasonvarga]

Platform

macOS

Operating system version

macOS Tahoe 26.3.1 (a)

System architecture

ARM64 (M1, M2, etc)

PolyScope Version

0.16.0

Bug description

Adding a workspace via a pull request that doesn't target the default branch will assume the default base branch.

• The "Base" diff in the sidebar is from the wrong base
• The "Pull latest from base" from the command palette tries to pull the repo's default base branch, not the PR's base branch.

Possibly related to #126

Steps to reproduce

• Have a PR that targets a non-default branch. (e.g. If the 6.x branch is the default, the PR should target 5.x)
• Create workspace "From pull request"
• The "Base" diff in the sidebar shows a diff against 6.x

Relevant log output

[mechelon]

Fixed in 0.25.0