v0.2.4

Bug Fixes

• CLI process exit: Fix CLI commands hanging ~10s after completion due to lingering Nostr WebSocket handles
• Instant split change token: Fix sender losing change token when process.exit() killed background proof collection before completion

Changes

• InstantSplitExecutor.submitBackgroundV5 now returns a trackable Promise<void> instead of fire-and-forget
• PaymentsModule tracks background promises and exposes waitForPendingOperations() for callers to await completion
• CLI send command awaits pending background operations before exiting
• InstantSplitResult now includes optional backgroundPromise field

Testing

• 914 unit tests passing
• 8/8 transfer e2e tests passing (balance + tombstone verified)
• 8/8 CLI e2e tests passing (instant + conservative, UCT/BTC/ETH)