move invokeai.db to ~/invokeai/databases

- The invokeai.db database file has now been moved into
  `INVOKEAIROOT/databases`. Using plural here for possible
  future with more than one database file.

- Removed a few dangling debug messages that appeared during
  testing.

- Rebuilt frontend to test web.

invokeai/app/api/dependencies.py

@@ -56,7 +56,7 @@ class ApiDependencies:
         output_folder = config.output_path
 
         # TODO: build a file/path manager?
-        db_location = os.path.join(output_folder, "invokeai.db")
+        db_location = config.db_path
 
         graph_execution_manager = SqliteItemStorage[GraphExecutionState](
             filename=db_location, table_name="graph_executions"