Policy Engine

[sharpener6]

We are going to implement scaler policy engine that is flexible and swappable

• use type to swap different engine
• if same type have different version, then create a new type, check below

Timebased config example:

[scheduler.policy]
engine_type = "time_based_v1"
content = """
# min  hour day month weekday capability
  *    0-9  *   *     *       aws_spot
  *    9-23 *   *     *       aws_ec2
"""