feat(rfa): complete RFA Approval Refactor - all 9 phases (T001-T080)

Phase 1-2: Setup, SQL schema, enums, queue constants, base entities
Phase 3 (US1): ReviewTeam, ReviewTeamMember, ReviewTask, TaskCreationService
Phase 4 (US2): ResponseCode, ResponseCodeRule, ImplicationsService, NotificationTriggerService
Phase 5 (US3): Delegation entity, CircularDetectionService, DelegationService/Controller/Module
Phase 6 (US4): ReminderRule, SchedulerService, EscalationService, ReminderProcessor, ReminderModule
Phase 7 (US5): DistributionMatrix, DistributionRecipient, ApprovalListenerService (Strangler),
               TransmittalCreatorService, DistributionProcessor, DistributionModule
Phase 8 (US6): MatrixManagementService, InheritanceService (global→project override)
Phase 9 (Polish): AggregateStatusService, ConsensusService, VetoOverrideService,
                  ParallelGatewayHandler, review-validators, optimistic locking in completeReview,
                  test stubs (unit/integration/e2e), jest.config.js updated for tests/ directory

Frontend: ReviewTaskInbox, ParallelProgress, VetoOverrideDialog, DelegationForm,
          DelegatedBadge, MatrixEditor, ProjectOverrideManager, DistributionStatus,
          ReminderHistory, ResponseCodeSelector, CodeImplications, CompleteReviewForm,
          ReviewTeamForm, ReviewTeamSelector, TeamMemberManager

Closes #1

frontend/components/review-task/DelegatedBadge.tsx

@@ -0,0 +1,39 @@
+'use client';
+
+// File: components/review-task/DelegatedBadge.tsx
+// แสดง indicator "Delegated from X" บน Review Task (T041)
+import { ArrowRightLeft } from 'lucide-react';
+import { Badge } from '@/components/ui/badge';
+import {
+  HoverCard,
+  HoverCardContent,
+  HoverCardTrigger,
+} from '@/components/ui/hover-card';
+
+interface DelegatedBadgeProps {
+  delegatedFromUser?: {
+    publicId: string;
+    fullName?: string;
+    email?: string;
+  };
+}
+
+export function DelegatedBadge({ delegatedFromUser }: DelegatedBadgeProps) {
+  if (!delegatedFromUser) return null;
+
+  const displayName = delegatedFromUser.fullName ?? delegatedFromUser.email ?? 'Unknown';
+
+  return (
+    <HoverCard>
+      <HoverCardTrigger asChild>
+        <Badge variant="outline" className="gap-1 text-xs text-muted-foreground border-dashed cursor-pointer">
+          <ArrowRightLeft className="h-3 w-3" />
+          Delegated
+        </Badge>
+      </HoverCardTrigger>
+      <HoverCardContent className="w-auto p-2">
+        <p className="text-sm">Delegated from: <strong>{displayName}</strong></p>
+      </HoverCardContent>
+    </HoverCard>
+  );
+}