Fix retry flow: reset pro_state without deleting professional record

- resetRejected: only set pro_state=0, no DELETE (avoids FK constraint errors
  from services/reputations with onDelete: NoAction)
- upsert: detect re-submission after rejection (pro_state=0) and set pro_state=1
  so the request appears in admin pending list

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

backend/src/professionals/professionals.service.ts

@@ -75,6 +75,16 @@ export class ProfessionalsService {
       return this.prisma.professionals.create({ data: { user_id: userId, is_active: false, ...data } });
     }
 
+    // Re-submitting after rejection reset (pro_state=0): move back to pending
+    const user = await this.prisma.users.findUnique({ where: { id: userId }, select: { pro_state: true } });
+    if (user?.pro_state === 0) {
+      await this.prisma.$transaction([
+        this.prisma.professionals.update({ where: { user_id: userId }, data: { ...data, is_active: false } }),
+        this.prisma.users.update({ where: { id: userId }, data: { pro_state: 1 } }),
+      ]);
+      return this.prisma.professionals.findUnique({ where: { user_id: userId } });
+    }
+
     return this.prisma.professionals.update({ where: { user_id: userId }, data });
   }
 
@@ -171,11 +181,9 @@ export class ProfessionalsService {
   async resetRejected(userId: string) {
     const prof = await this.prisma.professionals.findUnique({ where: { user_id: userId } });
     if (!prof) throw new NotFoundException('No se encontró solicitud');
-    await this.prisma.$transaction([
-      this.prisma.professionals.delete({ where: { user_id: userId } }),
-      this.prisma.users.update({ where: { id: userId }, data: { pro_state: 0 } }),
-    ]);
-    return { message: 'Solicitud eliminada' };
+    // Reset to 0 without deleting — avoids FK constraint errors from services/reputations
+    await this.prisma.users.update({ where: { id: userId }, data: { pro_state: 0 } });
+    return { message: 'Solicitud reiniciada' };
   }
 
   async deactivate(id: string) {