fix(P1+P2): swarm review — UX fixes + V1 dead code cleanup

P1 — UX visible:
- Add 4 missing translations (leather_mittens, ball_gag_3d, taser, debug_wand)
- Fix earplugs resistance bucket: "blindfold" → "earplug"
- Split mixin config: core (require=1) + compat MCA (require=0)
- Bump PROTOCOL_VERSION from "1" to "2"
- Add debug_wand item model (no texture — debug only)
- Fix 3 display_name inconsistencies (chain, vine_seed, shock_collar_auto)

P2 — Dead code cleanup:
- Delete IHas3DModelConfig + Model3DConfig (zero imports)
- Remove MovementStyleResolver.resolveV1Fallback() + V1Fallback record + V1 constants
- Remove AnimationTickHandler V1 fallback block + buildAnimationId()
- Document PlayerEquipment.equipInRegion() bypass as intentional (force-equip paths)

src/main/resources/data/tiedup/tiedup_items/chain.json

@@ -1,6 +1,6 @@
 {
   "type": "tiedup:bondage_item",
-  "display_name": "Chains",
+  "display_name": "Chain",
   "translation_key": "item.tiedup.chain",
   "model": "tiedup:models/gltf/v2/binds/chain.glb",
   "regions": [

src/main/resources/data/tiedup/tiedup_items/classic_earplugs.json

@@ -17,7 +17,7 @@
   "components": {
     "lockable": {},
     "resistance": {
-      "id": "blindfold"
+      "id": "earplug"
     }
   }
 }

src/main/resources/data/tiedup/tiedup_items/shock_collar_auto.json

@@ -11,7 +11,7 @@
       "body"
     ]
   },
-  "display_name": "Auto Shock Collar",
+  "display_name": "Automatic Shock Collar",
   "translation_key": "item.tiedup.shock_collar_auto",
   "model": "tiedup:models/gltf/v2/collars/shock_collar_auto.glb",
   "components": {

src/main/resources/data/tiedup/tiedup_items/vine_seed.json

@@ -1,6 +1,6 @@
 {
   "type": "tiedup:bondage_item",
-  "display_name": "Vine Bind",
+  "display_name": "Vine Seed",
   "translation_key": "item.tiedup.vine_seed",
   "model": "tiedup:models/gltf/v2/binds/vine_seed.glb",
   "regions": [