-- students — migrated off the Lab image's SQLite (Phase 1/2A). This is the FIRST table in
-- Postgres to become authoritative for platform academic/identity data — environments.student_id
-- (Provisioner schema) stays an opaque TEXT reference, no cross-database FK games; a real FK
-- from environments to this table is a natural follow-up once both are settled, not required
-- for Phase 2B.

CREATE TABLE IF NOT EXISTS students (
  student_id      TEXT PRIMARY KEY,
  display_name    TEXT NOT NULL,
  status          TEXT NOT NULL DEFAULT 'active',   -- 'active' | 'inactive'
  created_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
  last_active_at  TIMESTAMPTZ
);

CREATE INDEX IF NOT EXISTS idx_students_status ON students(status);