feat(expenses): add transactional expense case events

server/src/app/api/deps.py

@@ -26,6 +26,7 @@ class CurrentUserContext:
     name: str
     role_codes: list[str]
     is_admin: bool
+    tenant_id: str = "default"
     department_name: str = ""
     cost_center: str = ""
     position: str = ""
@@ -101,6 +102,7 @@ def get_current_user(
         name=name or username,
         role_codes=role_codes,
         is_admin=is_admin,
+        tenant_id="default",
         department_name=(x_auth_department or "").strip(),
         cost_center=(x_auth_cost_center or "").strip(),
         position=(x_auth_position or "").strip(),