ALTER TABLE users ADD COLUMN display_name TEXT;
ALTER TABLE users ADD COLUMN active INTEGER NOT NULL DEFAULT 1;
ALTER TABLE users ADD COLUMN last_login_at TEXT;
ALTER TABLE users ADD COLUMN updated_at TEXT NOT NULL DEFAULT (datetime('now'));
ALTER TABLE users ADD COLUMN failed_attempts INTEGER NOT NULL DEFAULT 0;
ALTER TABLE users ADD COLUMN locked_until TEXT;

ALTER TABLE animal_history ADD COLUMN user_id INTEGER REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE care_rounds ADD COLUMN performed_by_user_id INTEGER REFERENCES users(id) ON DELETE SET NULL;

CREATE TABLE audit_log (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER,
  action TEXT NOT NULL,
  method TEXT NOT NULL,
  path TEXT NOT NULL,
  entity_type TEXT,
  entity_id INTEGER,
  summary TEXT,
  metadata TEXT,
  ip_address TEXT,
  created_at TEXT NOT NULL DEFAULT (datetime('now')),
  FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE SET NULL
);
CREATE INDEX idx_audit_log_created ON audit_log(created_at DESC);
CREATE INDEX idx_audit_log_user ON audit_log(user_id,created_at DESC);