-- Agent 采集策略：hostname 为空串代表全局默认，非空为按主机覆盖。 // Logan.Li
CREATE TABLE IF NOT EXISTS monitor_agent_settings (
    id BIGSERIAL PRIMARY KEY,
    hostname VARCHAR(255) NOT NULL DEFAULT '',
    report_interval INT NOT NULL DEFAULT 10,
    config_poll_interval INT NOT NULL DEFAULT 30,
    updated_by VARCHAR(128) NOT NULL DEFAULT '',
    created_at TIMESTAMP NOT NULL,
    updated_at TIMESTAMP NOT NULL,
    CONSTRAINT uniq_agent_settings_hostname UNIQUE (hostname)
);