message: fix(origin-backend): store certificate energy as BigInt
diff: import { Entity, Column, PrimaryGeneratedColumn } from 'typeorm';
  import { CertificationRequestOffChainData } from '@energyweb/origin-backend-core';
  -import { IsInt, Min } from 'class-validator';
  +import { IsPositive, Min, Max } from 'class-validator';
  import { ExtendedBaseEntity } from '../ExtendedBaseEntity';
  @Entity()
  @@ -9,9 +9,10 @@ export class CertificationRequest extends ExtendedBaseEntity
  @PrimaryGeneratedColumn()
  id: number;
  - @Column()
  - @IsInt()
  + @Column({ type: 'bigint' })
  + @IsPositive()
  @Min(0)
  + @Max(1e16)
  energy: number;
  @Column('simple-array')
  