Fall/winter sun (especially at this time of year) is at its minimum strength, so I generally don't think twice about moving plants to more exposed locations. As long as it's not incredibly abrupt (like indoor shade to outdoor full sun) the risk is low. When in doubt find an intermediate location and park your plants there for a week or two to give them a chance to build up resistance to the UV.
When I'm in the process of advancing a young plant from shade cloth protection to full sun (say it has graduated from the nursery and is now big enough to tolerate adult exposure) I usually take a lot longer to do it (maybe twice as long) during late spring/early summer compared to late fall/early winter. The difference here is that the midday sun during late spring/early summer reaches 80° in the sky (nearly vertical) whereas the midday sun during late fall/early winter reaches 33° in the sky (a third of the way to vertical). Solar energy is related to that angle and the difference between those two states is roughly two-fold. So late fall sun at midday is like late spring sun under 50% shade at midday.
If your trigona has leaves then it's definitely awake. There is a sort of spectrum with that plant, from rapid stem growth with lots of new leaves being generated, to a sort of rest state with leaves, to a sleepier resting state with no leaves. I don't think it will ever be truly dormant in your climate, provided things stay mild and bright. Lots of sun will help with evaporation, in turn helping you avoid wet feet. Fast draining soil will tend to hold a lot of air and that helps too. Not using too huge a pot would be a good idea too. Otherwise, trigona is not a Euphorbia you really need to worry about during the winter, compared to some of its kin anyway.