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

api/configs/middleware/vdb/chroma_configs.py

@@ -0,0 +1,39 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field, PositiveInt
+
+
+class ChromaConfigs(BaseModel):
+    """
+    Chroma configs
+    """
+
+    CHROMA_HOST: Optional[str] = Field(
+        description='Chroma host',
+        default=None,
+    )
+
+    CHROMA_PORT: PositiveInt = Field(
+        description='Chroma port',
+        default=8000,
+    )
+
+    CHROMA_TENANT: Optional[str] = Field(
+        description='Chroma database',
+        default=None,
+    )
+
+    CHROMA_DATABASE: Optional[str] = Field(
+        description='Chroma database',
+        default=None,
+    )
+
+    CHROMA_AUTH_PROVIDER: Optional[str] = Field(
+        description='Chroma authentication provider',
+        default=None,
+    )
+
+    CHROMA_AUTH_CREDENTIALS: Optional[str] = Field(
+        description='Chroma authentication credentials',
+        default=None,
+    )