feat: replace tenants with organization management

apps/server/src/students/dto/student.dto.ts

@@ -1,4 +1,4 @@
-import { IsString, IsOptional, IsEnum, IsNumber, IsInt } from 'class-validator';
+import { IsString, IsOptional, IsEnum, IsInt } from 'class-validator';
 
 export class CreateStudentDto {
   @IsString()
@@ -32,19 +32,12 @@ export class CreateStudentDto {
   @IsString()
   emergencyPhone?: string;
 
-  @IsOptional()
-  @IsString()
-  organization?: string;
-
-  @IsOptional()
-  @IsNumber()
-  tenantId?: number;
+  @IsInt()
+  organizationId: number;
 
   @IsOptional()
   @IsString()
   supervisor?: string;
-  @IsOptional()
-
   @IsOptional()
   @IsInt()
   classId?: number;
@@ -84,12 +77,8 @@ export class UpdateStudentDto {
   emergencyPhone?: string;
 
   @IsOptional()
-  @IsString()
-  organization?: string;
-
-  @IsOptional()
-  @IsNumber()
-  tenantId?: number;
+  @IsInt()
+  organizationId?: number;
 
   @IsOptional()
   @IsString()