vx redeploy deploys main instead of current branch

[evoleinik]

Problem

vx redeploy always redeploys the main branch deployment, ignoring the current git branch or worktree context.

Expected: When run from a worktree checked out to feat/leroy-onboard, vx redeploy should retrigger the preview deployment for that branch.

Actual: It redeployed main (airshelf-bmyzj56bz-eugeneoteam.vercel.app), not the feat/leroy-onboard preview.

Context

We needed to retrigger the Vercel preview for feat/leroy-onboard after adding missing DATABASE_URL / DIRECT_DATABASE_URL env vars. vx redeploy didn't help — had to push an empty commit from the worktree instead.

Suggested fix

vx redeploy should:

1. Detect the current git branch (git branch --show-current)
2. Find the latest deployment for that branch (filter by meta.githubCommitRef)
3. Redeploy that deployment, not the latest production one

Alternatively, support vx redeploy --branch feat/leroy-onboard to explicitly target a branch.