migrate during initialize dbos (#22)

Move migration to initialize before systemDB creates the datasource

Author: manojdbos

src/main/java/dev/dbos/transact/DBOS.java

@@ -73,6 +73,9 @@ public static synchronized DBOS initialize(DBOSConfig config) {
         if (instance != null) {
             throw new IllegalStateException("DBOS has already been initialized.");
         }
+        if (config.migration()) {
+            MigrationManager.runMigrations(config);
+        }
         instance = new DBOS(config);
         return instance ;
     }
@@ -86,6 +89,9 @@ public static synchronized DBOS initialize(DBOSConfig config, SystemDatabase sd,
             throw new IllegalArgumentException("Config, systemdb, dbosexecutor cannot be null");
         }
 
+        if (config.migration()) {
+            MigrationManager.runMigrations(config);
+        }
         instance = new DBOS(config, sd, de, q, ss);
         return instance ;
     }
@@ -210,11 +216,7 @@ public Queue build() {
         }
     }
     public void launch() {
-
-        if (config.migration()) {
-            MigrationManager.runMigrations(config);
-        }
-
+        
         queueService.start();
 
         schedulerService.start();