r3d/runtime: allocs, keeps and births at 0 on this side

render3d: shadow_fit, water_reflection_pass, layer_partition_lods and the
GPU cull's scratch are made with the state; v3_dist is scalar; the pushes
into lists sized at start-up, the caps probe, the table growth, the loads
and the constructors declared with their bounds (one statement a line);
the renderer's name made once with the device; the two error messages
given back; the dead lupine models removed.

runtime: a component's text is held interned in its value cell (one copy
per distinct text), so the getter's own text goes with its frame instead
of being kept by ludic.ui's model - 80 of the 83 keeps.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/ludic.render3d/skin.ludic

@@ -214,6 +214,7 @@ function skin_bind(render3d_st: mut Render3dState, sk: Skin, prog: int) -> void
 
 # the same skeleton posed on its own: shares the rest data, owns the pose and the matrices
 @creates(SkinClone)
+@alloc_ok("one per figure placed (a person, an animal): actor_release frees it with the actor")
 function skin_clone(src: Skin) -> Skin {
   let sk = new Skin
   sk.n_nodes = src.n_nodes;  sk.par = src.par;  sk.walk = src.walk