-- Add base_sha + head_sha to ClaudeJob (per-job verify scope + merge-guard).
-- Add pause_context to SprintRun (rich PAUSED-state for merge-conflicts).
-- All nullable so legacy rows remain valid; new code-paths set them.

-- AlterTable
ALTER TABLE "claude_jobs" ADD COLUMN     "base_sha" TEXT,
ADD COLUMN     "head_sha" TEXT;

-- AlterTable
ALTER TABLE "sprint_runs" ADD COLUMN     "pause_context" JSONB;
