feat: per-category finalist slot quotas with confirmed-count guard

src/server/routers/_app.ts

@@ -49,6 +49,8 @@ import { roundEngineRouter } from './roundEngine'
 import { roundAssignmentRouter } from './roundAssignment'
 import { deliberationRouter } from './deliberation'
 import { resultLockRouter } from './resultLock'
+// Grand-finale logistics
+import { finalistRouter } from './finalist'
 
 /**
  * Root tRPC router that combines all domain routers
@@ -104,6 +106,8 @@ export const appRouter = router({
   roundAssignment: roundAssignmentRouter,
   deliberation: deliberationRouter,
   resultLock: resultLockRouter,
+  // Grand-finale logistics
+  finalist: finalistRouter,
 })
 
 export type AppRouter = typeof appRouter