feat: schedule student supervision rules

supabase/migrations/202606300014_student_supervision_rules.sql

@@ -0,0 +1,44 @@
+create table if not exists public.tenant_student_supervision_rules (
+  id uuid primary key default gen_random_uuid(),
+  tenant_id uuid not null references public.tenants(id) on delete cascade,
+  name text not null,
+  status text not null default 'active'
+    check (status in ('active', 'disabled', 'archived')),
+  rules jsonb not null default '{}'::jsonb,
+  schedule jsonb not null default '{}'::jsonb,
+  class_id uuid references public.tenant_classes(id) on delete set null,
+  assigned_to_user_id uuid references public.platform_users(id) on delete set null,
+  limit_count integer not null default 20 check (limit_count between 1 and 100),
+  metadata jsonb not null default '{}'::jsonb,
+  last_run_at timestamptz,
+  next_run_at timestamptz,
+  last_result jsonb not null default '{}'::jsonb,
+  created_by uuid references public.platform_users(id) on delete set null,
+  updated_by uuid references public.platform_users(id) on delete set null,
+  created_at timestamptz not null default now(),
+  updated_at timestamptz not null default now()
+);
+
+comment on table public.tenant_student_supervision_rules is
+  'Tenant-scoped learning supervision rule templates used by admins and workers to generate student follow-up tasks.';
+
+create index if not exists idx_student_supervision_rules_tenant_status
+  on public.tenant_student_supervision_rules(tenant_id, status, next_run_at nulls first, created_at desc);
+
+create index if not exists idx_student_supervision_rules_worker_due
+  on public.tenant_student_supervision_rules(status, next_run_at nulls first)
+  where status = 'active';
+
+alter table public.tenant_student_supervision_rules enable row level security;
+
+drop policy if exists tenant_isolation on public.tenant_student_supervision_rules;
+create policy tenant_isolation on public.tenant_student_supervision_rules
+  for all
+  using (tenant_id = app.current_tenant_id() or app.is_platform_admin())
+  with check (tenant_id = app.current_tenant_id() or app.is_platform_admin());
+
+drop trigger if exists set_updated_at on public.tenant_student_supervision_rules;
+create trigger set_updated_at
+  before update on public.tenant_student_supervision_rules
+  for each row
+  execute function app.touch_updated_at();