schema: add isChair to AwardJuror, justification to AwardVote

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

prisma/migrations/20260406000000_add_award_master_chair_and_justification/migration.sql

@@ -0,0 +1,5 @@
+-- AlterTable
+ALTER TABLE "AwardJuror" ADD COLUMN "isChair" BOOLEAN NOT NULL DEFAULT false;
+
+-- AlterTable
+ALTER TABLE "AwardVote" ADD COLUMN "justification" TEXT;

prisma/schema.prisma

@@ -1649,6 +1649,7 @@ model AwardJuror {
   id      String  @id @default(cuid())
   awardId String
   userId  String
+  isChair Boolean @default(false)
 
   createdAt DateTime @default(now())
 
@@ -1667,6 +1668,7 @@ model AwardVote {
   userId    String
   projectId String
   rank          Int?    // For RANKED mode
+  justification String? @db.Text
   votedAt       DateTime @default(now())
 
   // Relations