Function decodeInviteDetails

decodeInviteDetails(
    invite: Envelope,
    now: Date,
    registry: Registry,
    recipient: XIDDocument,
    expectedSender?: XIDDocument,
): InviteDetails
Decode and validate invite details from an envelope.

Port of decode_invite_details() from cmd/dkg/participant/receive.rs lines 154-256.
Parameters
- invite: Envelope
- now: Date
- registry: Registry
- recipient: XIDDocument
- OptionalexpectedSender: XIDDocument
Returns InviteDetails
- Defined in cmd/dkg/participant/receive.ts:122