fix: proof req validate

libs/dtos/src/dtos/requests/proof.req.dto.ts

-import { IsNotEmpty, IsString } from "class-validator";
+import { IsNotEmpty, IsString, ValidateIf } from "class-validator";
 
 
 // INFO: should cover:
@@ -10,8 +10,11 @@ import { IsNotEmpty, IsString } from "class-validator";
 export class ProofReqDto {
   @IsString()
   @IsNotEmpty()
+  @ValidateIf((o) => o.proofUrl === undefined)
   proofRecordId: string;
 
   @IsString()
-  proofUrl?: string;
+  @IsNotEmpty()
+  @ValidateIf((o) => o.proofUrl === undefined)
+  proofUrl: string;
 }
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