feat: add ticket workflow APIs

backend/apps/tickets/schemas.py

@@ -0,0 +1,52 @@
+from datetime import datetime
+
+from ninja import Schema
+
+
+class TicketIn(Schema):
+    title: str
+    description: str
+    priority: str = "medium"
+    impact_scope: str = ""
+    environment: str = ""
+    related_system: str = ""
+    assignee_id: int | None = None
+
+
+class TicketUpdateIn(Schema):
+    title: str | None = None
+    description: str | None = None
+    priority: str | None = None
+    impact_scope: str | None = None
+    environment: str | None = None
+    related_system: str | None = None
+    assignee_id: int | None = None
+
+
+class TicketStatusIn(Schema):
+    status: str
+    remark: str = ""
+
+
+class TicketOut(Schema):
+    id: int
+    ticket_no: str
+    title: str
+    description: str
+    status: str
+    priority: str
+    impact_scope: str
+    environment: str
+    related_system: str
+    assignee_id: int | None
+    created_at: datetime
+    updated_at: datetime
+
+
+class TicketEventOut(Schema):
+    id: int
+    event_type: str
+    from_value: dict
+    to_value: dict
+    remark: str
+    created_at: datetime