Function persistRound2Packages

persistRound2Packages(
    registryPath: string,
    groupId: ARID,
    successes: [XID, Round2ResponseData][],
): string
Persist Round 2 packages from parallel collection results.

Port of persist_round2_packages() from round2.rs lines 712-758.
Parameters
- registryPath: string
- groupId: ARID
- successes: [XID, Round2ResponseData][]
Returns string
- Defined in cmd/dkg/coordinator/round2.ts:452