feat(partners): add utility functions for partner business activity allocation limits and remaining licenses

- Implemented `getPartnerBusinessActivityAllocationLimits` to retrieve allocation limits for a partner's business activity.
- Added `ensurePartnerBusinessActivityHasRemainingAllocation` to validate remaining allocation credits.
- Created `getPartnerRemainingLicenses` to count remaining licenses for a partner.
- Developed `getPartnerFirstRemainingLicense` to fetch the first unused license for a partner.
- Introduced `ensurePartnerHasRemainingLicense` to ensure a partner has at least one unused license.

src/modules/partners/consumers/business-activities/dto/create-business-activities.dto.ts

@@ -1,5 +1,5 @@
 import { ApiProperty, PartialType } from '@nestjs/swagger'
-import { IsString } from 'class-validator'
+import { IsDateString, IsOptional, IsString } from 'class-validator'
 
 export class CreateBusinessActivitiesDto {
   @IsString()
@@ -11,8 +11,18 @@ export class CreateBusinessActivitiesDto {
   economic_code: string
 
   @IsString()
-  @ApiProperty({})
+  @ApiProperty({ required: true })
   guild_id: string
+
+  @IsDateString()
+  @IsOptional()
+  @ApiProperty({ required: false })
+  license_starts_at: string
+
+  @IsDateString()
+  @IsOptional()
+  @ApiProperty({ required: false })
+  expires_at: string
 }
 
 export class UpdateBusinessActivityDto extends PartialType(CreateBusinessActivitiesDto) {}