fix: exclude duplicated datoms from tail when restore db

Author: tiensonqin

src/datascript/storage.cljs

@@ -158,7 +158,10 @@
                       :max-eid max-eid
                       :max-tx  max-tx})]
         (remember-db db)
-        [db (mapv #(mapv (fn [[e a v tx]] (db/datom e a v tx)) %) tail)]))))
+        [db (mapv #(keep (fn [[e a v tx]]
+                           (when (nil? (db/-datoms db :eavt e a v nil))
+                             (db/datom e a v tx))) %)
+                  tail)]))))
 
 (defn db-with-tail [db tail]
   (reduce