An item could be sent to a department while still in its initial (open) state,
bypassing activation. Added a status guard to the 4 send entry points:
- observation_send_to_department / observation_send_to (AJAX)
- inquiry_transfer_to_department / inquiry_send_to (AJAX)
Rejects with "Activate this {observation/inquiry} before sending it to a
department." if status is open. Re-sends after a rejection still work (item
stays in_progress).
Also:
- seed_e2e_dept_response: observation status "new" -> "open" (valid initial;
"new" isn't a valid ObservationStatus, which is why activate never moved it)
- spec: Flow A/B/C now activate before send
Flow A now drives the real screens - detail page, Send-to modal, dept-response
page, Accept button - so the run is watchable in headed mode. Each visible step
falls back to a direct POST if the UI doesn't persist, so the flow still
completes reliably. Flows B/C unchanged.
