feat: sync procedures of period 21

[ManAnRuck]

This pull request makes a small adjustment to the services/cron-jobs/sync-procedures/src/index.ts file. The change adds a new period (21) to the periods array in the start function configuration.

[Copilot]

Pull Request Overview

This PR updates the sync-procedures cron job configuration by adding a new period (21) to the periods array.

• Updated the periods array to include the new period 21
• Supports the updated sync procedures requirements

Comments suppressed due to low confidence (1)

services/cron-jobs/sync-procedures/src/index.ts:257

• Ensure that the new period (21) is fully supported by the downstream logic and that any integration tests or documentation are updated accordingly.

        periods: [18, 19, 20, 21],