Feature: GET Schedule Endpoints

[Umang-Rajkarnikar]

Changes made:

• Created an endpoint to fetch commands by a schedule
• Created an endpoint to fetch schedules by a satellite

Testing:

• GET commands by schedule: /schedule/getCommandsBySchedule
• GET schedules by a satellite: /schedule/getSchedulesBySatellite

[Umang-Rajkarnikar]

please add tests to this pr

Added