feat(sprint-4/etapa-2): migración persistencia proceso/grupos/settings a Supabase

- Scripts SQL 002-004: process_groups, processes, app_settings con RLS
- supabaseProcessRepo: save/getById/getAll/delete con mapeo camelCase↔snake_case
  y limpieza Dexie en delete (actividades/gateways/resources/simulations)
- supabaseGroupRepo: save/getAll/getById/delete; FK ON DELETE SET NULL en processes
- supabaseSettingsRepo: get/update sobre fila singleton
- Stores actualizados: library-store y process-store usan repos Supabase para procesos
  (actividades/gateways/recursos siguen en Dexie hasta Etapa 3-4)
- ImportPage y useReportData actualizados a supabaseProcessRepo
- userId inyectado internamente en repos via supabase.auth.getSession() — no se
  threadea por la call stack; stores mantienen interfaces sin cambios
- 561/561 tests verdes, build limpio

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

src/features/import/ImportPage.tsx

@@ -4,7 +4,8 @@ import { UploadCloud, FileText, Loader2, FlaskConical } from 'lucide-react'
 import { v4 as uuidv4 } from 'uuid'
 import { Card, CardContent } from '@/components/ui/card'
 import { parseBpmnXml, extractActivityElements, extractGatewayElements, BpmnParseError } from '@/domain/bpmn-parser'
-import { processRepo, activityRepo, gatewayRepo } from '@/persistence/repositories'
+import { activityRepo, gatewayRepo } from '@/persistence/repositories'
+import { supabaseProcessRepo } from '@/persistence/supabase/process-repo'
 import type { Process, Activity, GatewayConfig } from '@/domain/types'
 import { bpmnTypeToGatewayType } from '@/domain/types'
 import { useToast } from '@/components/ui/use-toast'
@@ -112,7 +113,7 @@ export function ImportPage() {
       })
 
       await Promise.all([
-        processRepo.save(process),
+        supabaseProcessRepo.save(process),
         activityRepo.saveMany(activities),
         gatewayRepo.saveMany(gateways),
       ])