The field triplet for a one-shot timed phase: {name}DurationFormula,
{name}DurationBase, and {name}Date (the crystallized actual, null until
the phase fires).
Parameters
name: string
The phase name (e.g. "onset", "resolution").
Returns foundry.data.fields.DataSchema
A partial DataSchema to spread into a DataModel schema.
The field triplet for a one-shot timed phase:
{name}DurationFormula,{name}DurationBase, and{name}Date(the crystallized actual,nulluntil the phase fires).