CREATE TABLE punishments (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    chat_id INTEGER NOT NULL,
    target_user_id INTEGER NOT NULL,
    action_type TEXT NOT NULL, -- 'ban', 'mute', 'kick'
    duration_seconds INTEGER, -- NULL = permanent
    reason TEXT,
    created_by INTEGER NOT NULL,
    created_at TEXT NOT NULL DEFAULT (datetime('now')),
    revoked_at TEXT,
    revoked_by INTEGER,
    active INTEGER NOT NULL DEFAULT 1
);
CREATE INDEX idx_punishments_chat_target ON punishments(chat_id, target_user_id);
CREATE INDEX idx_punishments_active ON punishments(active);