updatable config + better schemas

[Mayukhdeb]

Changes made:

1. Updated the schemas to be more uniform/intuitive:

/run starts the task and returns something like:

{
    'token': str
}

/fetch has 3 possibilities based on the status of the tasks

• If the task is queued:

  {
  'status': {
      'status': 'queued',
      'queue_position': int
  },
  'config': dict,
  }

• If the task is running:

  {
  'status': {
      'status': 'running',
      'progress': float
  
  },
  'config': dict,
  'output': dict
  }

• If the task is complete:

  {
  'status': {
      'status': 'complete'
  },
  'output': dict,
  'config': dict
  }

• If the task has failed:

  {
  'status': {
      'status': 'failed'
  },
  'output': dict,
  'config': dict
  }

/update returns either something like:

{
    'status': {
        'status': 'successfully updated config'
    },
}

or if the task is already complete:

{
    'status': {
        'status': 'task is aleady complete'
    },
}

or if the token is invalid:

{
    'status': {
        'status': 'invalid token'
    },
}

2. Added tests in eden which checks the data types, schemas and /update. The tests can be run with the following steps:

• Run server:

python3 eden/tests/server.py

• Run tests:

pytest eden/tests

3. other misc changes:

• got rid of torch as a dependency
• fixed requirements.txt