NIP-17 gift wraps are re-fetched on every cold start (the kind-1059
subscription has no since cursor because gift-wrap timestamps are
randomized up to 2 days in the past). Without a decrypted-DM cache,
remote-signer mode (Amber) re-runs two NIP-44 IPC decrypts per wrap on
every launch.
Adds an ObjectBox-backed cache keyed by ownerPubkey|giftWrapId. On
construction, DmRepository hydrates conversations, seenGiftWraps,
rumorIdIndex and the DM notification list from disk off the main thread.
addPendingGiftWrap now short-circuits on seenGiftWraps before queuing,
so relay-redelivered wraps never reach the signer; only newly arrived
wraps are decrypted. addMessage / addReaction / addZap re-persist the
parent message so reactions and zaps survive restarts. clear() and
purgeUser() propagate to the persistence layer.
Barry Deen
4894ccee40