v0.13.0

The second release of the SQLite adapter: the absent database is answered,
and the quiet doors are quiet.

com.vaelii/sqlite is an Apache-2.0 adapter on the SSPL engine. It depends
on core; core never depends on it. open-kb reaches it lazily through the
:sqlite records axis.

• A source over a file no sink has written answers absent. read-manifest
  on a file with no image tables answers nil — the seam's absent case — so a
  first-run load-index! reports {:index :rebuild :reason :absent} instead of
  throwing no such table, and drop-image! skips a table that is not there,
  as its docstring says.
• The four quiet doors are quiet. put-provenance, delete-provenance!,
  mark-premise and unmark-premise! gate on id-ok? the way every fetch
  does, so a handle this store could never have issued — an informant keyword —
  is a no-op rather than a driver error or a ClassCastException out of the
  cache key.
• A failed open releases its connection. sqlite-record-store and
  sqlite-sink close the connection they borrowed when construction throws
  past the borrow, so a retried open of a corrupt or locked file no longer
  leaks a handle and its WAL per attempt.

The number. The engine, the plugin and both adapters ship one version
string, checked at the cut. Requires core 0.13.0.