Docs: roadmap — enemy-test GYM as the animated-validation home (operator direction)

Defer the in-game skinned-enemy animated check to a purpose-built semi-permanent
gym scene (Phase 1's 'no world - a gym') with spawn-a-chosen-enemy tooling, rather
than hacking the shared wave roster. Survives the coming enemy-system rework; the
3 skinned prefabs are ready to drop in.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Docs/Vault/06_Roadmap/Roadmap_Lantern_Slice.md

@@ -191,6 +191,14 @@ Runs parallel with 4–6 where possible.
 > Reusable gotchas banked: Blender-5.1 Synty-FBX import workaround, bounds-normalize scattered Synty rocks, posed-static
 > hero bake (apply-armature + visual-transform), the Unity URP render-harness (layer sign-bit, `SubmitRenderRequest`),
 > and the `EnemyRigTools.BuildDrowner` path + its EG-only-render caveat.
+>
+> **Enemy-test GYM (operator direction 2026-07-14) — the home for the animated validation + tuning.** Rather than hack
+> the shared `Gameplay.unity` wave roster for a one-off animated check, build a **semi-permanent gym scene** (this is
+> Phase 1's "no world — a gym") with **tooling to spawn a chosen enemy on demand** (Drowner/Grindylow/… for
+> test+tune). It survives the anticipated **enemy-system rework** (the gym is test scaffolding, independent of enemy
+> design). The 3 skinned prefabs (`EnemyDrowner` w/ eyes, `EnemyGrindylow`, `SuitFrame_Bathynaut`) are built + ready to
+> drop in. This is a focused `/dots-dev` build (netcode boot + a baked enemy-roster subscene + a spawn system/debug UI)
+> — the in-game **animated confirmation of the skinned pipeline lands here**, not via a roster hack.
 
 ## A2 — The creature factory (runs alongside Phases 2–6)