feat(bar): implement Barbarian Warcries (IDs 130, 131, 137, 138, 142, 146, 149, 150, 154, 155)
- Authoritative 1.13c parity for 10 Barbarian Warcries
- Exact Shout, Battle Orders, Battle Command duration scaling & mutual synergies
- Exact 5-band physical damage progression for War Cry with +6%/blvl synergies
- Authentic Battle Cry defense/damage debuff scaling and duration
- Authentic Taunt forced melee & debuff progression
- Diminishing returns for Find Potion and Find Item
- Grim Ward 1000-frame (40s) totem duration & flee radius scaling
- Adversarial stress tests (slvl 0, 1, 10, 20, 99)
- Enforces BATCH1_SKILLS length invariant = strictly 38
- Fixes #466
troytt
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