feat: introduce pydantic-settings for config definition and validation (#5202)

Co-authored-by: -LAN- <laipz8200@outlook.com>

api/configs/extra/notion_configs.py

@@ -0,0 +1,33 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+class NotionConfigs(BaseModel):
+    """
+    Notion integration configs
+    """
+    NOTION_CLIENT_ID: Optional[str] = Field(
+        description='Notion client ID',
+        default=None,
+    )
+
+    NOTION_CLIENT_SECRET: Optional[str] = Field(
+        description='Notion client secret key',
+        default=None,
+    )
+
+    NOTION_INTEGRATION_TYPE: Optional[str] = Field(
+        description='Notion integration type, default to None, available values: internal.',
+        default=None,
+    )
+
+    NOTION_INTERNAL_SECRET: Optional[str] = Field(
+        description='Notion internal secret key',
+        default=None,
+    )
+
+    NOTION_INTEGRATION_TOKEN: Optional[str] = Field(
+        description='Notion integration token',
+        default=None,
+    )