fix(#240): remove readyCount from weekly stats DTO and SQL query

The Lesefertig pulse was removed from the UI; drop the backend support
for it too — removes the subquery from findWeeklyStats(), the projection
getter, the DTO field, and updates all affected tests.

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

frontend/src/lib/generated/api.ts

@@ -1519,8 +1519,6 @@ export interface components {
             segmentationCount: number;
             /** Format: int64 */
             transcriptionCount: number;
-            /** Format: int64 */
-            readyCount: number;
         };
         TranscriptionQueueItemDTO: {
             /** Format: uuid */
@@ -1548,14 +1546,14 @@ export interface components {
             displayName?: string;
             firstName?: string;
             lastName?: string;
-            /** Format: int64 */
-            documentCount?: number;
             /** Format: int32 */
             birthYear?: number;
             /** Format: int32 */
             deathYear?: number;
             alias?: string;
             notes?: string;
+            /** Format: int64 */
+            documentCount?: number;
             personType?: string;
         };
         TrainingInfoResponse: {