Durable damage is invisible, misleading, and creates false weapon expectations

Durable damage is one of the most impactful stats in the game but is completely hidden from players. Every weapon has a separate durable damage value that silently replaces its listed damage on any enemy part flagged as "durable." The problem is threefold:

1. Weapon cards only show base damage, which is meaningless without knowing the durable damage ratio. A weapon with 140 damage and 10% durable damage deals only ~14 effective damage against high-durability parts — a 90% reduction never communicated to the player.

2. Enemy durability changes are never noted in patch notes. When Arrowhead raises a part's durability % (e.g. Charger legs, Rocket Devastator chest), every weapon in the game is silently nerfed against that enemy with no disclosure. Players lose effective playstyles with no explanation.

3. The player-vs-enemy asymmetry is undocumented. Enemy weapons use durable damage as an amplifier against player equipment (Exosuit, shields), while player weapons use it as a reduction — these are functionally opposite mechanics sharing the same name.

Expected behaviour: players should be able to read a weapon's stats and understand how it will perform. Actual behaviour: weapons routinely underperform their listed stats against common enemies, and the reason is invisible to all but dataminers.