v0.20.0

Changed

• BREAKING: The process-wide storage holders are replaced by a
  session-scoped StorageContext (src/storage/storageContext.ts), created by
  createAuthStore and exposed as storageContext on the auth store's state.
  It owns the open replica, the remote store, the writer id, the sync status
  store, and the re-hydrate timers, and its whileAttached is the one staleness
  mechanism the change patches, the scheduled re-hydrates, and hasLocalData
  run on. The app-facing facades (requireStore, hasStore,
  requireRemoteStore, hasRemoteStore, requireWriterId, stampLww,
  publicUrlFor, the entity-store verbs) now resolve the active context, and
  opening a replica while another context still holds one throws (before the
  database is opened) instead of clobbering it. createAuthStore skips its
  creation-time activation while another session is live, so a keyed provider
  remount fails the new provider's boot rather than throwing during render.
• hasLocalData() keeps resolving false (with a warning) when a count fails
  against the attached replica, rather than rejecting into the login handler.
• Tearing down a session now cancels the pending re-hydrates before draining the
  sync controller, so a debounced re-hydrate cannot fire against a replica that
  is about to close.
• BREAKING: Removed setLocalStore, clearLocalStore, setRemoteStore,
  clearRemoteStore, setWriterId, clearWriterId, useSyncStatusStore,
  hydrateAll, clearAllEntityStores, patchFromChange, scheduleRehydrate,
  and cancelScheduledRehydrates. Test harnesses attach a store through
  new StorageContext({ registry, writerId }).attachStore(store); the
  re-hydrate verbs are StorageContext methods; sync status is
  storageContext.syncStatus (a vanilla zustand store,
  createSyncStatusStore).
• BREAKING: SyncController takes a syncStatus store in its constructor;
  mergeAdopted takes the writerId explicitly.
• getWriterId moved to src/storage/writerId.ts beside the new
  clearPersistedWriterId (localStorage only); the running session's id is
  replaced by StorageContext.resetWriterId.
• issueSeedCredential delegates to wallet-core's issueAppKeyCredential (the
  issuer the wallet mints with) instead of re-implementing the app-key
  credential's shape; its signature and return value are unchanged. Requires
  @interop/wallet-core >= 0.66.0. The test teaching server is bumped to
  0.25.1, which verifies the eddsa-jcs-2022 zcap proofs newer wallet-core
  releases sign with.

Added

• New exports: StorageContext, activateStorageContext,
  deactivateStorageContext, hasStorageContext, requireStorageContext,
  createSyncStatusStore, clearPersistedWriterId, and the SyncStatusStore
  type.