Scaffold V2 backend foundation

ai_knowledge_base_v2/apps/backend/app/schemas/chat.py

@@ -0,0 +1,42 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.schemas.common import ORMModel
+
+
+class CreateSessionResponse(BaseModel):
+    sessionId: int
+
+
+class ChatSessionRead(ORMModel):
+    model_config = ConfigDict(from_attributes=True, populate_by_name=True)
+
+    id: int
+    title: str
+    messageCount: int = Field(alias="message_count")
+    updatedAt: datetime = Field(alias="updated_at")
+
+
+class ChatMessageRead(ORMModel):
+    id: int
+    role: str
+    content: str
+    message_status: str
+    created_at: datetime
+
+
+class UpdateSessionTitleRequest(BaseModel):
+    sessionId: int
+    title: str = Field(min_length=1, max_length=100)
+
+
+class ChatCompletionRequest(BaseModel):
+    sessionId: int
+    message: str = Field(min_length=1, max_length=4000)
+
+
+class StopChatRequest(BaseModel):
+    sessionId: int