Also add the positive companion assertion (folded in from a Task 3 review
Minor): findFederatedUser tier-2 STILL returns a NON-detached (orphaned=0)
same-name federated row, locking that the eq(federation_home_orphaned, 0)
clause discriminates on the flag alone and never over-filters legitimate
replicated identities.
All three behaviors pass against the shipped Task 1-3 code; no product-code
change was required.
Heals existing legacy stubs (created when resolveOrCreateReplicatedUser used
homeUserId@domain) by asking the peer for the canonical username via
lookupRemoteUserByHomeId and rewriting the local row. Idempotent and
collision-safe.
Wired into onPeerActivated (per-origin) so future peer flaps re-attempt for
stubs whose home was unreachable on a prior pass, and into a one-shot pass at
startupBootstrapSync for all currently-active peers (not just first-time
lastSyncedAt=0 peers).
Jannis Braun