Fix PvP/PvE ratio caps and damage multiplier handling

[Birthright50]

This PR fixes PvP/PvE damage ratio handling by applying caps to aggregated attack and defense ratios instead of individual stats.

On retail, PvP/PvE attack and defense ratios (base + physical/magical modifiers) are capped only after aggregation.
Using per-stat lower/upper cap helpers would incorrectly clamp individual components and break valid mixed-stat configurations.

The final damage multiplier is additionally clamped to prevent negative or zero damage values, while upper bounds remain governed by stat caps.

lowerCapFor / upperCapFor functions operate on individual stats,
while PvP/PvE ratio limits on retail apply to the final aggregated value
(base + physical/magical modifiers).
Using per-stat caps would change valid configurations and result in incorrect behavior.

PvP Caps

PVP_ATTACK_RATIO + PVP_ATTACK_RATIO_PHYSICAL | PVP_ATTACK_RATIO_MAGICAL
∈ [-900 … 1000]   // -90% … +100%

PVP_DEFEND_RATIO + PVP_DEFEND_RATIO_PHYSICAL | PVP_DEFEND_RATIO_MAGICAL
∈ [-1000 … 900]   // -100% … +90%

PvE caps:

PVE_ATTACK_RATIO + PVE_ATTACK_RATIO_PHYSICAL | PVE_ATTACK_RATIO_MAGICAL
∈ [-900 … 5000]   // -90% … +500%

PVE_DEFEND_RATIO+ PVE_DEFEND_RATIO_PHYSICAL | PVE_DEFEND_RATIO_MAGICAL
∈ [-5000 … 900]   // -500% … +90%

Final Damage Multiplier:

multiplier = 1 + (attackRatio - defenseRatio) / 1000
multiplier >= 0.1

For example:
PvEDamageRatio + PvEDamageRatio_magical cap = 5000

PvPDamageRation min and max cap