refactor(awards): remove AWARD_MASTER role, fold features into jury chair flow

The AWARD_MASTER role split sponsor jurors into a parallel UI that hid
project files (only showed when the award was anchored to an evaluation
round) and duplicated the jury voting path with no real difference in
authority — tie-break and finalize were already governed by AwardJuror.isChair
regardless of the user's global role. Inviting a juror via the award page
defaulted to AWARD_MASTER, randomly fragmenting jury panels.

This collapses the role into JURY_MEMBER + isChair:

- specialAward.getMyAwardDetail now returns evaluation scores, chair
  visibility into other jurors' votes, and juror roster
- specialAward.submitVote accepts an optional justification per vote
- specialAward.confirmWinner moves from awardMasterProcedure to
  protectedProcedure (juror+chair check inside)
- bulkInviteJurors creates JURY_MEMBER accounts and, when the award has
  a juryGroupId, also adds them to that JuryGroup so they appear on
  the round-page jury panel
- jury award page renders justification, eval-score badges, and a
  chair tools panel with vote tally + finalize-winner CTA
- juryGroup.list includes attached SpecialAwards; the jury-list UI
  shows a trophy pill alongside round pills
- (award-master) route group, awardMasterProcedure, AWARD_MASTER role
  enum value, and AWARD_MASTER_DECISION decisionMode are deleted
- migration demotes any residual AWARD_MASTER users to JURY_MEMBER and
  recreates the UserRole enum without the value

Coup de Coeur on prod: Didier (the sponsor juror added today as
AWARD_MASTER by the buggy invite form) was migrated to JURY_MEMBER and
attached to the existing "Coup de Coeur" JuryGroup; the SpecialAward
itself was linked to that group (juryGroupId was NULL).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/(admin)/admin/awards/[id]/edit/page.tsx

@@ -58,7 +58,7 @@ export default function EditAwardPage({
   const [votingEndAt, setVotingEndAt] = useState('')
   const [evaluationRoundId, setEvaluationRoundId] = useState('')
   const [eligibilityMode, setEligibilityMode] = useState<'STAY_IN_MAIN' | 'SEPARATE_POOL'>('STAY_IN_MAIN')
-  const [decisionMode, setDecisionMode] = useState<'JURY_VOTE' | 'AWARD_MASTER_DECISION' | 'ADMIN_DECISION'>('JURY_VOTE')
+  const [decisionMode, setDecisionMode] = useState<'JURY_VOTE' | 'ADMIN_DECISION'>('JURY_VOTE')
 
   // Helper to format date for datetime-local input
   const formatDateForInput = (date: Date | string | null | undefined): string => {
@@ -236,7 +236,6 @@ export default function EditAwardPage({
                 </SelectTrigger>
                 <SelectContent>
                   <SelectItem value="JURY_VOTE">Jury Vote — tallied from all jurors</SelectItem>
-                  <SelectItem value="AWARD_MASTER_DECISION">Award Master — sponsor picks winner</SelectItem>
                   <SelectItem value="ADMIN_DECISION">Admin Decision — admin selects winner</SelectItem>
                 </SelectContent>
               </Select>