exploration failure is now dynamic, using the new exploration_fail_chance_modifier.
exploration missions have a base 10% monthly fail chance.
missions on areas that have locations with cape or deep ocean topography will have an increased monthly fail chance, until the new Allow Cape Exploration and Allow Deep Ocean Exploration modifiers are enabled from researching certain advances.
characters in exploration missions reduce exploration fail chance based on their adm, scaling from 0% to -75% fail chance.
explorers reduce exploration fail chance by -25%, and some of their traits reduce it as well.
the exploration_fail_chance_modifier applies the reduction percentage to the base 10% monthly fail chance.
it is now possible to send exploration from colonial nation subject locations with a dock building and its upgrades.
fixed some localization issues, especially the new Convert Galleys to Fire Ships action.

fixed issues related to explorations not failing

fixed some bugs related to exploration cost still being accounted for, as well as the iberian caravel appearing in the wrong age