Add cash management schema and immediate variance alerts

server/db/init/50_employee_payments.sql

@@ -0,0 +1,32 @@
+-- =====================================================================
+-- Local extension migration: simple employee payment ledger used by the
+-- Employee Payment Report UI. Backed by the API; not a Supabase migration.
+-- =====================================================================
+
+create table if not exists app.employees (
+  id          uuid primary key default gen_random_uuid(),
+  emp_id      text not null unique,
+  name        text not null,
+  email       text,
+  department  text,
+  location    text,
+  created_at  timestamptz not null default now()
+);
+
+create table if not exists app.employee_transactions (
+  id                uuid primary key default gen_random_uuid(),
+  employee_id       uuid not null references app.employees(id) on delete cascade,
+  transaction_date  date not null,
+  collection_amount numeric(18,2) not null default 0,
+  deposit_amount    numeric(18,2) not null default 0,
+  currency          text not null check (currency in ('USD','LBP')),
+  created_at        timestamptz not null default now()
+);
+
+create index if not exists idx_emp_tx_emp on app.employee_transactions(employee_id, transaction_date desc);
+
+-- These tables are owned by the API; RLS off, gated at the HTTP layer.
+alter table app.employees             disable row level security;
+alter table app.employee_transactions disable row level security;
+grant select, insert, update, delete on app.employees             to authenticated;
+grant select, insert, update, delete on app.employee_transactions to authenticated;