feat: photos for tech tasks, 3 priorities, remove cleaning status from context menu

- Remove 'Убирается' (cleaning) from manually selectable HK statuses in calendar context menu — it now only shows automatically when a task is in_progress
- Reduce priorities from 4 to 3: remove 'high', keep urgent/medium/low across context menu, tech tasks modal, and HousekeepingTask type
- Add photo upload to technical tasks: upload via camera button per task, display thumbnails with hover-to-remove, stored as TEXT[] in DB (migration 026)
- Fix HousekeepingPage WS handler to filter by category — no longer adds maintenance tasks to housekeeping board
- Add 'tasks' folder support to upload route

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/CalendarPage.tsx

@@ -158,7 +158,7 @@ export function CalendarPage() {
     try {
       const updated = await api.rooms.update(slug, roomId, patch)
       setRooms(prev => prev.map(r => r.id === updated.id ? updated : r))
-      if (patch.housekeepingStatus === 'dirty' || patch.housekeepingStatus === 'cleaning') {
+      if (patch.housekeepingStatus === 'dirty') {
         const today = new Date().toISOString().slice(0, 10)
         const task = await api.housekeeping.create(slug, {
           room_id: roomId,