-- Migration: 018_audit_log
-- Create audit_log table for tracking security-relevant events (login, register, etc.)

CREATE TABLE IF NOT EXISTS audit_log (
    id SERIAL PRIMARY KEY,
    user_id INTEGER,
    event_type VARCHAR(50) NOT NULL,
    ip_address VARCHAR(45),
    user_agent TEXT,
    details JSONB,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_audit_log_user_id ON audit_log(user_id);
CREATE INDEX idx_audit_log_event_type ON audit_log(event_type);
CREATE INDEX idx_audit_log_created_at ON audit_log(created_at);