CREATE TABLE IF NOT EXISTS sessions (
    token TEXT PRIMARY KEY NOT NULL,
    account_id TEXT NOT NULL UNIQUE,
    browser_id TEXT NOT NULL,
    email TEXT NOT NULL,
    password_ciphertext TEXT NOT NULL,
    user_hash TEXT NOT NULL,
    imap_host TEXT NOT NULL,
    imap_port INTEGER NOT NULL,
    imap_tls INTEGER NOT NULL,
    imap_tls_verify INTEGER NOT NULL,
    smtp_host TEXT NOT NULL,
    smtp_port INTEGER NOT NULL,
    smtp_tls INTEGER NOT NULL,
    smtp_tls_verify INTEGER NOT NULL,
    timeout_secs INTEGER NOT NULL,
    created_at_unix INTEGER NOT NULL,
    last_accessed_unix INTEGER NOT NULL,
    user_agent TEXT NOT NULL DEFAULT ''
);
CREATE INDEX IF NOT EXISTS idx_sessions_browser ON sessions(browser_id);
CREATE INDEX IF NOT EXISTS idx_sessions_user ON sessions(user_hash);
CREATE INDEX IF NOT EXISTS idx_sessions_expiry ON sessions(last_accessed_unix, timeout_secs);