Docs: reduce over-documentation across gameplay scripts

Trim restated narration, dead commented-out code, and oversized class
headers; keep all why-comments (authority, timing, edge cases), tooltips,
and serialization caveats.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/Scripts/ConcealmentColliderBaker.cs

@@ -198,7 +198,6 @@ public class ConcealmentColliderBaker : MonoBehaviour
         int made = 0;
         for (int ci = 0; ci < clusters.Count; ci++)
         {
-            // Unique verts of this cluster.
             var pset = new HashSet<int>();
             var pts = new List<Vector3>();
             List<int> cl = clusters[ci];