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

api/configs/middleware/vdb/pgvector_configs.py

@@ -0,0 +1,34 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field, PositiveInt
+
+
+class PGVectorConfigs(BaseModel):
+    """
+    PGVector configs
+    """
+
+    PGVECTOR_HOST: Optional[str] = Field(
+        description='PGVector host',
+        default=None,
+    )
+
+    PGVECTOR_PORT: Optional[PositiveInt] = Field(
+        description='PGVector port',
+        default=None,
+    )
+
+    PGVECTOR_USER: Optional[str] = Field(
+        description='PGVector user',
+        default=None,
+    )
+
+    PGVECTOR_PASSWORD: Optional[str] = Field(
+        description='PGVector password',
+        default=None,
+    )
+
+    PGVECTOR_DATABASE: Optional[str] = Field(
+        description='PGVector database',
+        default=None,
+    )