Is there a source that details all the difficulty class (DC) of various activities outside of combat: spotting traps (perception check), noticing danger (survival check), understand religious material (religion check)? What dice rolls do I need to succeed in these activities? Lock-picking and speech checks are the only things that show on-screen dice rolls. Combat dice rolls are well-explained in the descriptions of the characters and items. But the kind of activities like the ones mentioned above are done automatically with hidden dice rolls. My success rate in these things seems to be about 50% give or take, so I'm guessing their DC is about 10-12. But it would be nice to know the exact numbers.
Also, when enemies attack me with spells, what is their saving throw difficulty class? My characters' saving throw DC is shown in their spellbooks. But I can't see enemies' spellbooks.