Function toEnvelope

toEnvelope(value: unknown): Serialization.JSONValue
Serialize a value to a parsed JSON envelope (object/array/primitive) rather than a string. Use this when nesting functype values inside another structured serializer (SuperJSON / DBOS custom transformers / similar) whose custom-transformer hook expects JSON values, not strings — passing a string to such a hook causes the host to re-walk it character-by-character, destroying the round-trip.

Equivalent to JSON.parse(serialize(value)) but exposed as a named entry point so consumers don't carry the parse/stringify shim.

Returns JSONValue (tightened from unknown in 1.2.2) so consumers can drop the result straight into a host serializer's serialize hook without a boundary cast.
Parameters
- value: unknown
Returns Serialization.JSONValue
Example
```
// Inside a DBOS custom serialization recipe — zero casts:
  DBOS.registerSerialization({
    name: "functype",
    isApplicable: Serialization.isFunctypeValue,
    serialize:   Serialization.toEnvelope,
    deserialize: (o) => Serialization.fromEnvelope(o).orThrow(),
  })
```