No bounds on calendar means web spiders crawl the links relentlessly

I am maintaining a Craft 3 site w/ the calendar plugin, and noticed that Craft's /storage/runtime/cache folder was filling up with tens of thousands of files and using tens of gigabytes of space.

I tracked the issue down by examining the webserver's access logs and found various spiders crawling the "next" and "last" links, resulting in dates both very far in the future and past.

I modified the twig templates (month.html, day.html, week.html) to include something like the following:

{% set month = craft.calendar.month({
    date: targetDate,
    calendar: calendarHandle,
}) %}

{% set the_diff = now.diff(month.nextDate)|date('%r%a') %}

<!-- CALENDAR NAVIGATION - MONTHS -->
<div class="calendar-nav mb-3">

    {% if the_diff > -365 %}
        <div class="btn-prev">
            <a class="btn btn-outline-secondary"
href="{{ siteUrl }}{{ calendarBasePath }}{{ month.previousDate.format('Y/m') }}{{ urlParamsString }}">
                <span class="fas fa-arrow-left"></span><span class="d-none d-sm-inline"> {{ month.previousDate.format('F') }}</span>
            </a>
        </div>
    {% else %}
        <div><!-- no link for spiders, but add an empty div to not break the layout --></div>
    {% endif %}

So, this is more of a feature request, but it would be nice if I could go into the general settings of the plugin and set bounds on the links like I've done in the template, so that at a certain length of time either forwards or backwards, the "next" and "last" links no longer appear.

Craft & Plugin Info (please complete the following information):

Craft Version: 3.7.57
Calendar Version: 3.3.16
Calendar Edition: Pro
Fresh Install or Upgrade: Fresh

solspace / craft-calendar

No bounds on calendar means web spiders crawl the links relentlessly #171