refactor

core/racing/domain/entities/Weight.ts

@@ -0,0 +1,20 @@
+import { RacingDomainValidationError } from '../errors/RacingDomainError';
+
+export class Weight {
+  private constructor(private readonly value: number) {}
+
+  static create(value: number): Weight {
+    if (value <= 0) {
+      throw new RacingDomainValidationError('Weight must be positive');
+    }
+    return new Weight(value);
+  }
+
+  toNumber(): number {
+    return this.value;
+  }
+
+  equals(other: Weight): boolean {
+    return this.value === other.value;
+  }
+}