feat: Ein-/Auswinterung und Winterverluste je Volk

- WinterCheck per colony, winter and season (autumn/spring), every field
  editable; loss causes limited to the COLOSS monitoring categories.
- Summary per winter and apiary: loss rate lost/wintered, marked
  provisional while colonies are not yet checked in spring - an unchecked
  colony never counts as survived.
- A loss marks the colony deceased only on explicit request, in the same
  transaction and audited.
- Permissions winter-checks:read/create/update granted by migration to
  beekeeper and staff roles; winter checks included in backups.
- Page "Überwinterung": next action first, one button per row until the
  colony is wintered, German number format.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Backend/src/backup/backup.service.spec.ts

@@ -24,6 +24,7 @@ const BUSINESS_ENTITY_KEYS = [
   'task',
   'varroaMeasurement',
   'swarmControlCheck',
+  'winterCheck',
   'treatment',
   'feeding',
   'harvest',

ApiCore-Backend/src/backup/backup.service.ts

@@ -93,6 +93,7 @@ export class BackupService {
     data.task = await this.prisma.task.findMany();
     data.varroaMeasurement = await this.prisma.varroaMeasurement.findMany();
     data.swarmControlCheck = await this.prisma.swarmControlCheck.findMany();
+    data.winterCheck = await this.prisma.winterCheck.findMany();
     data.treatment = await this.prisma.treatment.findMany();
     data.feeding = await this.prisma.feeding.findMany();
     data.harvest = await this.prisma.harvest.findMany();
@@ -430,6 +431,21 @@ export class BackupService {
         }
         imported.swarmControlCheck = rowsOf('swarmControlCheck').length;
 
+        for (const row of rowsOf('winterCheck')) {
+          await tx.winterCheck.upsert({
+            where: { id: row.id as string },
+            create: {
+              ...row,
+              userId: resolveUserId(asString(row, 'userId')),
+            } as never,
+            update: {
+              ...row,
+              userId: resolveUserId(asString(row, 'userId')),
+            } as never,
+          });
+        }
+        imported.winterCheck = rowsOf('winterCheck').length;
+
         for (const row of rowsOf('treatment')) {
           await tx.treatment.upsert({
             where: { id: row.id as string },