reformat custom fields table. will return to this topic later

sql/states.sql

@@ -1,16 +1,16 @@
 create table states
 (
-    id          INTEGER
+    id            integer
         primary key autoincrement,
-    word_id     INTEGER           not null
+    word_id       integer           not null
         references words
             on delete cascade,
-    deck_id      INTEGER              not null
+    deck_id       integer           not null
         references decks
             on delete cascade,
-    score       INTEGER default 1 not null,
-    last_opened INTEGER           not null,
-    fsrs_opened INTEGER not null,
-    fsrs_memory INTEGER not null,
-    fsrs_open_day INTEGER not null
+    score         integer default 1 not null,
+    last_opened   integer           not null,
+    fsrs_opened   integer           not null,
+    fsrs_memory   integer           not null,
+    fsrs_open_day integer           not null
 );