feat: add knowledge base core api

backend/apps/knowledge/schemas.py

@@ -0,0 +1,67 @@
+from datetime import datetime
+
+from ninja import Schema
+
+
+class KnowledgeBaseIn(Schema):
+    name: str
+    description: str = ""
+    scope: str = ""
+    enabled: bool = True
+
+
+class KnowledgeBaseOut(Schema):
+    id: int
+    name: str
+    description: str
+    scope: str
+    enabled: bool
+    created_at: datetime
+    updated_at: datetime
+
+
+class KnowledgeDocumentIn(Schema):
+    knowledge_base_id: int
+    file_name: str
+    file_type: str = ""
+    content: str
+
+
+class KnowledgeDocumentOut(Schema):
+    id: int
+    knowledge_base_id: int
+    file_name: str
+    file_type: str
+    parse_status: str
+    parse_error: str
+    created_at: datetime
+
+
+class KnowledgeItemIn(Schema):
+    knowledge_base_id: int
+    title: str
+    problem: str
+    applicable_scope: str = ""
+    error_code: str = ""
+    root_cause: str = ""
+    troubleshooting_steps: str = ""
+    solution: str
+    risk_note: str = ""
+    status: str = "draft"
+
+
+class KnowledgeItemOut(Schema):
+    id: int
+    knowledge_base_id: int
+    title: str
+    problem: str
+    applicable_scope: str
+    error_code: str
+    root_cause: str
+    troubleshooting_steps: str
+    solution: str
+    risk_note: str
+    status: str
+    source_type: str
+    created_at: datetime
+    updated_at: datetime