fix data flow issues

core/racing/domain/entities/Race.ts

@@ -240,6 +240,48 @@ export class Race implements IEntity<string> {
     return Race.create(props);
   }
 
+  /**
+   * Re-open a previously completed or cancelled race
+   */
+  reopen(): Race {
+    if (this.status === 'scheduled') {
+      throw new RacingDomainInvariantError('Race is already scheduled');
+    }
+
+    if (this.status === 'running') {
+      throw new RacingDomainInvariantError('Cannot re-open a running race');
+    }
+
+    const base = {
+      id: this.id,
+      leagueId: this.leagueId,
+      scheduledAt: this.scheduledAt,
+      track: this.track,
+      car: this.car,
+      sessionType: this.sessionType,
+      status: 'scheduled' as RaceStatus,
+    };
+
+    const withTrackId =
+      this.trackId !== undefined ? { ...base, trackId: this.trackId } : base;
+    const withCarId =
+      this.carId !== undefined ? { ...withTrackId, carId: this.carId } : withTrackId;
+    const withSof =
+      this.strengthOfField !== undefined
+        ? { ...withCarId, strengthOfField: this.strengthOfField }
+        : withCarId;
+    const withRegistered =
+      this.registeredCount !== undefined
+        ? { ...withSof, registeredCount: this.registeredCount }
+        : withSof;
+    const props =
+      this.maxParticipants !== undefined
+        ? { ...withRegistered, maxParticipants: this.maxParticipants }
+        : withRegistered;
+
+    return Race.create(props);
+  }
+
   /**
    * Update SOF and participant count
    */