Creating migration to fix focus essence bug

[phildominguez]

In this PR

• Reworking Essence migrations to handle:
  1. Standard Essence damage migration
  2. Possible case where essence.max.max existed
  3. Previous migration may have set it to a SchemaField()
• Adding missing awaits to setRoleValues and setFocusValues, which were causing race conditions

Testing

• Checkout 63b8d08 (this is pre-Essence damage)
• Create a character
• Checkout ecbf803 (this is post-Essence damage, but the migration throws in a SchemaField)
• No errors/Essences are fine
• Checkout this branch (this fixes remaining migration issues)
• No errors/Essences are fine
• Setting Essence values and leveling for the actor should work as expected (correct values and no flickering)