Backend Notifications: 1 - migrations

backend/supabase/migrations/20260404000001_create-notifications-table.sql

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+-- Create notifications table
+create table if not exists public.notifications (
+    id         uuid        primary key default gen_random_uuid(),
+    user_id    text        not null references public.users(id) on delete cascade,
+    type       text        not null,
+    title      text        not null,
+    body       text        not null,
+    data       jsonb,
+    read_at     timestamptz,
+    is_archived boolean     not null default false,
+    archived_at timestamptz,
+    created_at  timestamptz default now()
+);
+
+create index if not exists idx_notifications_user_id_created_at
+    on public.notifications (user_id, created_at desc)
+    where is_archived = false;
+
+-- Enable RLS
+alter table public.notifications enable row level security;

backend/supabase/migrations/20260404000002_create-device-tokens-table.sql

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+-- Create device_tokens table for mobile push notifications
+create table if not exists public.device_tokens (
+    id         uuid        primary key default gen_random_uuid(),
+    user_id    text        not null references public.users(id) on delete cascade,
+    token      text        not null,
+    platform   text        not null, -- 'ios' | 'android'
+    created_at timestamptz default now(),
+    unique (user_id, token)
+);
+
+-- Enable RLS
+alter table public.device_tokens enable row level security;