Epic: Release hotfixes for next alpha-loop release

[bradtaylorsf]

Goal

Fix the four open bug/regression issues that should be addressed before the next alpha-loop release.

Ordered Sub-Issues

• bug: run --skip-epic --label ready crashes in hasEpicLabel with 'Cannot read properties of undefined (reading toLowerCase)' #295 - Fix run --skip-epic --label ready crash in hasEpicLabel.
• bug: run --dry-run --validate creates real branches and worktrees, breaking the next real run #294 - Make run --dry-run --validate read-only and prevent branch/worktree mutations.
• fix: plan --dry-run does not persist the draft, breaking the natural review-then-create flow #279 - Persist plan --dry-run drafts so plan --resume can create the reviewed plan.
• fix: init GraphQL mutation for project board statuses is malformed (quoted keys in object literal) #280 - Fix malformed init GraphQL mutation for project board status creation.

Acceptance Criteria

• All four child issues are closed by merged fixes.
• pnpm build passes.
• pnpm test passes.
• Regression tests cover the four reported failures.
• Dry-run validation is verified not to create local branches, remote branches, draft PRs, worktrees, or new commits.

Run Notes

Use alpha-loop run --epic <this issue> --validate --batch --batch-size 1 --verbose after a non-validating dry-run preview, because one child issue covers a defect in --dry-run --validate itself.

[bradtaylorsf]

Released in v2.1.0 via consolidated PR #298 and release PR #299. All four child bug issues are closed.