StateSchemaFieldToChannel

Maps a single StateSchema field definition to its corresponding Channel type.

This utility type inspects the type of the field and returns an appropriate BaseChannel type, parameterized with the state "value" and "input" types according to the field's shape.

Rules:

• If the field (F) is a ReducedValue<V, I>, the channel will store values of type V and accept input of type I.
• If the field is a UntrackedValue<V>, the channel will store and accept values of type V.
• If the field is a SerializableSchema<I, O>, the channel will store values of type O (the schema's output/validated value) and accept input of type I.
• For all other types, a generic BaseChannel<unknown, unknown> is used as fallback.