Add graphrag (#1793)

### What problem does this PR solve?

#1594

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

agent/settings.py

@@ -0,0 +1,34 @@
+#
+#  Copyright 2019 The FATE Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+# Logger
+import os
+
+from api.utils.file_utils import get_project_base_directory
+from api.utils.log_utils import LoggerFactory, getLogger
+
+DEBUG = 0
+LoggerFactory.set_directory(
+    os.path.join(
+        get_project_base_directory(),
+        "logs",
+        "flow"))
+# {CRITICAL: 50, FATAL:50, ERROR:40, WARNING:30, WARN:30, INFO:20, DEBUG:10, NOTSET:0}
+LoggerFactory.LEVEL = 30
+
+flow_logger = getLogger("flow")
+database_logger = getLogger("database")
+FLOAT_ZERO = 1e-8
+PARAM_MAXDEPTH = 5