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/drawstats.ludic

@@ -119,6 +119,7 @@ function ds_kind_name(k: int) -> pointer {
   return "indirect"
 }
 # a per-frame mean with one decimal
+@alloc_ok("the draw-count report: printed once, at the end of a run that asked for it")
 function ds_per(render3d_st: Render3dState, v: long) -> string {
   let x = (v * 10) / render3d_st.ds_frames
   return `{string(x / 10)}.{string(x % 10)}`