Function collectRound2Parallel

collectRound2Parallel(
    client: StorageClient,
    registry: Registry,
    pendingRequests: PendingRequests,
    coordinatorKeys: PrivateKeys,
    expectedGroupId: ARID,
    timeout: number | undefined,
): Promise<CollectionResult<Round2ResponseData>>
Collect Round 2 responses in parallel with progress display.

Port of collect_round2_parallel() from round2.rs lines 607-643.
Parameters
- client: StorageClient
- registry: Registry
- pendingRequests: PendingRequests
- coordinatorKeys: PrivateKeys
- expectedGroupId: ARID
- timeout: number | undefined
Returns Promise<CollectionResult<Round2ResponseData>>
- Defined in cmd/dkg/coordinator/round2.ts:416