refactor: extract vdb configs into pydantic-setting based dify configs (#5426)

api/configs/middleware/vdb/milvus_configs.py

@@ -0,0 +1,39 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field, PositiveInt
+
+
+class MilvusConfigs(BaseModel):
+    """
+    Milvus configs
+    """
+
+    MILVUS_HOST: Optional[str] = Field(
+        description='Milvus host',
+        default=None,
+    )
+
+    MILVUS_PORT: PositiveInt = Field(
+        description='Milvus RestFul API port',
+        default=9091,
+    )
+
+    MILVUS_USER: Optional[str] = Field(
+        description='Milvus user',
+        default=None,
+    )
+
+    MILVUS_PASSWORD: Optional[str] = Field(
+        description='Milvus password',
+        default=None,
+    )
+
+    MILVUS_SECURE: bool = Field(
+        description='wheter to use SSL connection for Milvus',
+        default=False,
+    )
+
+    MILVUS_DATABASE: str = Field(
+        description='Milvus database',
+        default='default',
+    )