Added nice chart for account history.

resources/migrations/sql/create_tables_001.sql

@@ -80,12 +80,13 @@ CREATE TABLE IF NOT EXISTS accounts
 
 CREATE TABLE IF NOT EXISTS accounts_history
 (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
     account_id      INTEGER  NOT NULL,
     account_version INTEGER  NOT NULL,
     amount          INTEGER  NOT NULL,
     timestamp       DATETIME NOT NULL,
     FOREIGN KEY (account_id) REFERENCES accounts (id),
-    PRIMARY KEY (account_id, account_version)
+    UNIQUE (account_id, account_version)
 );
 
 CREATE TABLE IF NOT EXISTS account_user_permissions