feat(dashboard): expose findContributorsPerDocument in AuditLogQueryService

backend/src/main/java/org/raddatz/familienarchiv/dashboard/AuditLogQueryService.java

@@ -0,0 +1,52 @@
+package org.raddatz.familienarchiv.dashboard;
+
+import org.raddatz.familienarchiv.audit.AuditLogRepository;
+import org.springframework.stereotype.Service;
+
+import java.time.OffsetDateTime;
+import java.util.*;
+
+@Service
+public class AuditLogQueryService {
+
+    private final AuditLogQueryRepository queryRepository;
+
+    public AuditLogQueryService(AuditLogQueryRepository queryRepository) {
+        this.queryRepository = queryRepository;
+    }
+
+    public Optional<UUID> findMostRecentDocumentForUser(UUID userId) {
+        return queryRepository.findMostRecentDocumentIdByActor(userId);
+    }
+
+    public List<ActivityFeedRow> findActivityFeed(UUID currentUserId, int limit) {
+        return queryRepository.findDedupedActivityFeed(currentUserId.toString(), limit);
+    }
+
+    public PulseStatsRow getPulseStats(OffsetDateTime weekStart, UUID userId) {
+        return queryRepository.getPulseStats(weekStart, userId.toString());
+    }
+
+    public Map<UUID, UUID> findMostRecentActorPerDocument(List<UUID> documentIds, String kind) {
+        if (documentIds.isEmpty()) return Map.of();
+        List<Object[]> rows = queryRepository.findMostRecentActorPerDocument(documentIds, kind);
+        Map<UUID, UUID> result = new LinkedHashMap<>();
+        for (Object[] row : rows) {
+            UUID docId = (UUID) row[0];
+            UUID actorId = (UUID) row[1];
+            result.put(docId, actorId);
+        }
+        return result;
+    }
+
+    public Map<UUID, List<ActivityActorDTO>> findContributorsPerDocument(List<UUID> documentIds) {
+        if (documentIds.isEmpty()) return Map.of();
+        List<ContributorRow> rows = queryRepository.findContributorsPerDocument(documentIds);
+        Map<UUID, List<ActivityActorDTO>> result = new LinkedHashMap<>();
+        for (ContributorRow row : rows) {
+            result.computeIfAbsent(row.getDocumentId(), k -> new ArrayList<>())
+                  .add(new ActivityActorDTO(row.getActorInitials(), row.getActorColor(), row.getActorName()));
+        }
+        return result;
+    }
+}