Whether your fig chooses to hibernate or go dormant,
the needs are the same. A cool place to spend the winter. Your fig budded out when you brought it in because (in its little plant mind) winter was over and spring was here.
Spider mites love dusty plants. Keep your plants clean and spider mites won't be a problem. You didn't post a photo of the entire tree so we don't know how big it is or if there's room to prune it back. You can cut the leaves off and force it into dormancy (don't pull them off). Cut the little leaf stem (petiole) someplace between the trunk and the leaf. The rest of the petiole will fall off on its own.
Then, move it back outside so it can leaf out naturally. The temperatures in Vancouver never get cold enough to warrant bringing your fig inside.