render3d: to its floor - messages in declared helpers, post and DLSS set up at start, lists sized

Seventeen inline messages (allocation failures, missing conversions, the no-pipeline and compressed-
target warnings, resize and swapchain lines, the test-frame camera line, DLSS evaluate, shadow memory,
stream and terrain debug, the water test) are each a function of their own under @alloc_ok, taking
numbers, so the paths that say them hold no site. post_measure's two 1x1 exposure targets are made in
post_init and DLSS's evaluate structs in gsl_init; DLSS's camera up is a state field. The lists play
pushes into (retired, free ranges, spare ids, the per-buffer gpu flags, the stage and the actor spares)
get their room at start-up (gvk_room_*, actor_room), so a push fits. Compiled (steady).

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

packages/ludic.render3d/env.ludic

@@ -692,6 +692,7 @@ export state Render3dState {
   stream_debug_n: int = 0
   stream_scratch: floats = null
   gvk_pipe_bufs: words = null      # a pipeline's vertex buffers, while it is made
+  gsl_up: floats = floats(3)       # the camera's up for DLSS's constants
   ov_nine_buf: floats = floats(16)       # ov_nine's corners and uvs
   gvk_ac: pointer = null           # the VkAllocationCallbacks every create and destroy is given (R3D_ALLOC_VK=1)
   gvk_prime_b: words = null        # buffers made since the frame began, read once so MoltenVK makes their