Use intdiv where appropriate to prevent unexpected conversion to float.

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While using Telescope Toolbar I noticed that I couldn't view some of the profiles, so upon checking the request response on the Telescope dashboard it said Purged By Telescope.

I set TELESCOPE_RESPONSE_SIZE_LIMIT to some something really big and was still getting the same behavior. With some debugging I discovered that the check mb_strlen($content) / 1000 was giving a float as the result rather than an int.

Setting TELESCOPE_RESPONSE_SIZE_LIMIT to a float fixed the issue, however, I don't imagine this is the expected behavior. As such we can fix this issue by using the intdiv function.