Initial commit MKD fixes

backend/migrations/create_employee_responsibility.sql

@@ -0,0 +1,14 @@
+-- Зоны ответственности: привязка сотрудников к подразделам модулей (уведомления, эффективность).
+-- Запуск: psql -U user -d your_db -f create_employee_responsibility.sql
+
+CREATE TABLE IF NOT EXISTS employee_responsibility (
+  id          BIGSERIAL PRIMARY KEY,
+  employee_id VARCHAR(50) NOT NULL REFERENCES employees(id) ON DELETE CASCADE,
+  section     VARCHAR(50) NOT NULL,
+  sub_id      VARCHAR(50) NOT NULL,
+  created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  UNIQUE(employee_id, section, sub_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_employee_responsibility_employee ON employee_responsibility(employee_id);
+CREATE INDEX IF NOT EXISTS idx_employee_responsibility_zone ON employee_responsibility(section, sub_id);