Some of the stats on the pause menu have fairly obvious effects while other seem kind of vague.
Stride length adjusts movement speed(?)
Heel height increases trip chance
Platform height might do the same(?)
Heel diameter lowers trip chance(?)
Base heel height just goes up while wearing heels then resets randomly(?)
Vision intensity is how well you can see around you
Air blockage prevents potion drinking
Waist constriction influences stamina recovery(?)
Grabability is how easy you get away from enemies holding you
Left/Right hand coverage I have yet to see change but assume it would influence gear removal(?)
Wrist/Elbow connection has also not changed but assumed to influence attack chance(?)

Is there an item/enemy codex I can check to see where to get items and a more detailed description of what they do?

you can check what some enemies do in the level editor, but for all the attribute stuff i'm not sure