Can humanity help reinforce the ozone layer?
Would it be enough to simply vent ozone at point of manufacture, or would it be better released at the 10 km height?

Neither. The right answer is not to do it at all. Surface level ozone is deemed to be a pollutant. It is highly irritating to people. Ten kilometers is still in the troposphere. Ozone in the troposphere rarely makes its way to the stratosphere. Ozone is highly reactive, and there is plenty of stuff in the troposphere that ozone can readily oxidize. If this was to be done (which is a bad idea), the ozone would have to be released into the stratosphere. Ozone concentration peaks at about twenty kilometers altitude.
Why not at all? There are three billion metric tons of ozone in the stratosphere. Think of how much effort augmenting that would take, and how much ozone depleting chemicals would be deposited into the stratosphere while doing so. Jet engine and rocket exhaust contain chemicals that deplete ozone.