Implement 15 platform features: digest, availability, templates, comparison, live voting SSE, file versioning, mentorship, messaging, analytics, drafts, webhooks, peer review, audit enhancements, i18n

Features implemented:
- F1: Email digest notifications with cron endpoint and per-user frequency
- F2: Jury availability windows and workload preferences in smart assignment
- F3: Round templates with save-from-round and CRUD management
- F4: Side-by-side project comparison view for jury members
- F5: Real-time voting dashboard with Server-Sent Events (SSE)
- F6: Live voting UX: QR codes, audience voting, tie-breaking, score animations
- F7: File versioning, inline preview, bulk download with presigned URLs
- F8: Mentor dashboard: milestones, private notes, activity tracking
- F9: Communication hub with broadcasts, templates, and recipient targeting
- F10: Advanced analytics: cross-round comparison, juror consistency, diversity metrics, PDF export
- F11: Applicant draft saving with magic link resume and cron cleanup
- F12: Webhook integration layer with HMAC signing, retry, and delivery logs
- F13: Peer review discussions with anonymized scores and threaded comments
- F14: Audit log enhancements: before/after diffs, session grouping, anomaly detection, retention
- F15: i18n foundation with next-intl (EN/FR), cookie-based locale, language switcher

Schema: 12 new models, field additions to User, Project, ProjectFile, LiveVotingSession, LiveVote, MentorAssignment, AuditLog, Program
New routers: roundTemplate, message, webhook (registered in _app.ts)
New services: email-digest, webhook-dispatcher
New cron endpoints: /api/cron/digest, /api/cron/draft-cleanup, /api/cron/audit-cleanup
New API routes: /api/live-voting/stream (SSE), /api/files/bulk-download

All features are admin-configurable via SystemSettings or per-model settingsJson fields.
Docker build verified successfully.

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

src/server/routers/_app.ts

@@ -29,6 +29,10 @@ import { mentorRouter } from './mentor'
 import { filteringRouter } from './filtering'
 import { specialAwardRouter } from './specialAward'
 import { notificationRouter } from './notification'
+// Feature expansion routers
+import { roundTemplateRouter } from './roundTemplate'
+import { messageRouter } from './message'
+import { webhookRouter } from './webhook'
 
 /**
  * Root tRPC router that combines all domain routers
@@ -64,6 +68,10 @@ export const appRouter = router({
   filtering: filteringRouter,
   specialAward: specialAwardRouter,
   notification: notificationRouter,
+  // Feature expansion routers
+  roundTemplate: roundTemplateRouter,
+  message: messageRouter,
+  webhook: webhookRouter,
 })
 
 export type AppRouter = typeof appRouter