feat(backend): Koeniginnenbewertung (Modul 31)

QueenEvaluation-Modell (Volksstaerke, Sanftmut, Wabensitz, Schwarm-
trieb, Brutbild, Honigertrag je Skala 1-5) als Sub-Ressource der
Queens-API: GET/POST /queens/:id/evaluations. Vorgezogen vor Modul
27 (Statistik), da dessen Koeniginnen-Auswertungen auf diesen Daten
aufbauen.

ApiCore-Backend/prisma/schema.prisma

@@ -51,6 +51,7 @@ model User {
   auditLogs          AuditLog[]
   bottlingBatches    BottlingBatch[]
   notifications      Notification[]
+  queenEvaluations   QueenEvaluation[]
 
   @@index([role])
 }
@@ -172,6 +173,7 @@ model Colony {
   treatments         Treatment[]
   feedings           Feeding[]
   harvests           HarvestColony[]
+  queenEvaluations   QueenEvaluation[]
 
   @@index([apiaryId])
   @@index([status])
@@ -252,10 +254,37 @@ model Queen {
 
   colony        Colony?              @relation("ColonyCurrentQueen")
   colonyHistory QueenColonyHistory[]
+  evaluations   QueenEvaluation[]
 
   @@index([status])
 }
 
+// ---------------------------------------------------------------------------
+// Königinnenbewertung (Abschnitt 4.7) – v1.x Modul 31
+// ---------------------------------------------------------------------------
+
+model QueenEvaluation {
+  id                String   @id @default(cuid())
+  queenId           String
+  queen             Queen    @relation(fields: [queenId], references: [id])
+  colonyId          String?
+  colony            Colony?  @relation(fields: [colonyId], references: [id])
+  date              DateTime
+  colonyStrength    Int
+  gentleness        Int
+  combBuild         Int
+  swarmingTendency  Int
+  broodPattern      Int
+  honeyYield        Int
+  notes             String?
+  userId            String?
+  user              User?    @relation(fields: [userId], references: [id])
+  createdAt         DateTime @default(now())
+
+  @@index([queenId])
+  @@index([colonyId])
+}
+
 // Königinnenwechsel historisch nachvollziehbar (Abschnitt 4.5)
 model QueenColonyHistory {
   id        String    @id @default(cuid())