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)

build.gradle

@@ -104,6 +104,7 @@ minecraft {
 
             // Mixin config arg
             args '-mixin.config=tiedup.mixins.json'
+            args '-mixin.config=tiedup-compat.mixins.json'
         }
 
         server {
@@ -116,6 +117,7 @@ minecraft {
 
             // Mixin config arg
             args '-mixin.config=tiedup.mixins.json'
+            args '-mixin.config=tiedup-compat.mixins.json'
         }
 
         // Additional client instances for multiplayer testing
@@ -155,6 +157,7 @@ sourceSets.main.resources { srcDir 'src/generated/resources' }
 mixin {
     add sourceSets.main, 'tiedup.refmap.json'
     config 'tiedup.mixins.json'
+    config 'tiedup-compat.mixins.json'
 }
 
 repositories {
@@ -263,7 +266,7 @@ tasks.named('jar', Jar).configure {
                 'Implementation-Version'  : project.jar.archiveVersion,
                 'Implementation-Vendor'   : mod_authors,
                 'Implementation-Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
-                'MixinConfigs'            : 'tiedup.mixins.json'
+                'MixinConfigs'            : 'tiedup.mixins.json,tiedup-compat.mixins.json'
         ])
     }