fix: include direct round files in finalization doc count

Files uploaded by admins with roundId but no requirementId were not
counted in the finalization page Docs column.

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

src/server/services/round-finalization.ts

@@ -507,7 +507,10 @@ export async function getFinalizationSummary(
         where: {
           roundId,
           projectId: { in: projectIds },
-          requirementId: { in: requirements.map((r) => r.id) },
+          OR: [
+            { requirementId: { in: requirements.map((r) => r.id) } },
+            { requirementId: null },
+          ],
         },
         _count: { _all: true },
       })