🔢 🐎 Update value range & docstring of adjusted metrics

[mberr]

This PR updates the value ranges of adjusted metrics with guaranteed lower bounds, as well as their docstring with the analytical form of the lower bound. It also fixes displaying infinite lower bounds.

[cthoyt]

@mberr looks like there are some numerical issues with the new bounds of adjusted hits at K

[mberr]

@mberr looks like there are some numerical issues with the new bounds of adjusted hits at K

-3.4158865620691894 is pretty far of -1 thb 😅

EDIT: I think this is because AdjustedHitsAtK is actually the index, (H@k - E[H@k]) / (1 - E[H@k]) with minimum value -E[H@k]/(1 - E[H@k]). With E[H@k] -> 1, this approaches -inf (cf. here).

[cthoyt]

@PyKEEN-bot test