fix: remove invalid 'reason' field from ProjectStatusHistory.create

The field doesn't exist on the model, causing finalization to crash.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/server/services/round-finalization.ts

@@ -611,7 +611,6 @@ export async function confirmFinalization(
               projectId: prs.projectId,
               status: 'ASSIGNED',
               changedBy: actorId,
-              reason: `Advanced from round "${round.name}" via finalization`,
             },
           })
         } else {