Implement graceful deployments for Fly.io

[vishwamartur]

Related to #78

Implement graceful shutdown of old machines during Fly.io deployments to ensure livestreams are not interrupted.

• Pipeline Changes:

  • Modify lib/algora/pipeline.ex to list pipelines using Membrane.Pipeline.list_pipelines and check for running livestreams.
  • Add logic to destroy old machines if no livestreams are running in the :end_of_stream callback.

• Termination Logic:

  • Update lib/algora/terminate.ex to include a function terminate_interrupted_streams that lists pipelines and destroys old machines if no livestreams are running.

• Deployment Controller:

  • Add lib/algora_web/controllers/deployment_controller.ex to handle deployment-related actions such as starting/stopping livestreams, triggering deployments, confirming livestream continuity, and destroying old machines.

• Router Updates:

  • Modify lib/algora_web/router.ex to add routes for the new deployment-related actions in the DeploymentController.

• Tests:

  • Add test/algora_web/controllers/deployment_controller_test.exs to test the new deployment-related actions in the DeploymentController.

  /claim #78

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