Function async_log_service

src/fl/log/async_logger.cpp.hpp:203–221

// ============================================================================

void async_log_service() {
    // Get background flush state
    detail::BackgroundFlushState& state = Singleton<detail::BackgroundFlushState>::instance();

    // Quick check - return immediately if no flush needed
    if (!state.mNeedsFlush) {
        return;
    }

    // Clear flag
    state.mNeedsFlush = false;

    // Flush all instantiated async loggers (uses ActiveLoggerRegistry)
    // Only flushes loggers that have been accessed via template functions
    fl::size n = state.mMessagesPerTick;
    detail::ActiveLoggerRegistry::instance().forEach([n](AsyncLogger& logger) {
        logger.flushN(n);
    });
}

// ============================================================================
// Auto-instantiating service task implementation