Rule 21's carry from 3e Task 8's review: TodoController.update/.remove
passed the raw :id route string all the way to TodoItemsRepository,
relying on SQLite's column-affinity CAST to match it instead of a typed
filter. Parse :id ONCE at the controller (toRowId, matching Task 8a's
TripAccessGuard/removeMember shape), 404 on a non-canonical id, and thread
the number down through TodoService.updateItem/deleteItem into
TodoItemsRepository.findInTrip/existsInTrip/update/deleteById, all
narrowed from number | string to number. todo.rpc.ts's num()-derived
todoId no longer needs its String() wrapper. tripId stays string | number
— a separate, already-accepted carry (23c292f2f). Two new e2e tests pin
the non-numeric-id 404 at the gate.
jubnl
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