feat: 重构MCP功能和AI服务提供者架构

backend/app/schemas/relationship.py

@@ -1,5 +1,5 @@
 """关系管理相关的Pydantic模型"""
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, ConfigDict
 from typing import Optional, List
 from datetime import datetime
 
@@ -17,8 +17,7 @@ class RelationshipTypeResponse(BaseModel):
     description: Optional[str] = None
     created_at: datetime
     
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 
 # ============ 角色关系相关 ============
@@ -62,8 +61,7 @@ class CharacterRelationshipResponse(CharacterRelationshipBase):
     created_at: datetime
     updated_at: datetime
     
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 
 class RelationshipGraphNode(BaseModel):
@@ -127,8 +125,7 @@ class OrganizationResponse(OrganizationBase):
     created_at: datetime
     updated_at: datetime
     
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 
 class OrganizationDetailResponse(BaseModel):
@@ -185,8 +182,7 @@ class OrganizationMemberResponse(OrganizationMemberBase):
     created_at: datetime
     updated_at: datetime
     
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 
 class OrganizationMemberDetailResponse(BaseModel):