Add MicroCUDA backend, adaptive output wait, wider native K coverage (improve perf)

Shim
- Adaptive output-event wait: sleep to ~120 us before the predicted
  completion (smoothed per wait site), spin near it, back off when late.
  D4R_SHIM_OUTPUT_POLL_US restores a fixed interval.

- Defer the input-marker wait into the worker thread with VRAM interop
  (D4R_SHIM_DEFER_MARKER, default on), taking the host setup off the
  critical path.

MicroCUDA
- Experimental ZLUDA-free backend in wine_nvcuda_bridge, plus
  tools/microcuda and scripts/build_microcuda.sh. Serves accuracy, fast
  and native kernels; unregistered modules fall back to the reference
  path. Unclassified writes invalidate prepared weights.

M kernels
- SWIN_PREP_IDENTITY_AT: key weight prep by allocation identity
  (MicroCUDA); enc3 tube uses it with 8 slots. ZLUDA ignores it.

- dec2 (gfx1101): SWIN_PACKED_RESIDUAL, byte-identical, ~1.6% faster.

- Opt-in gfx12 hardware fp8 conversion (SWIN_FP8_HWCVT), unverified
  on hardware.

Native K translators
- ctile: handle variants that re-materialize the parameter base (mvlo).

- rewrite_output: check live-in registers, not just outputs.

- build.sh: native input covers all 8 flag variants, output the 4 HDR
  "max" variants; depth-tile skip stays mvhi-only.

Tools
- dump_runner and bench_dlss_kernel harness additions.

kernels/m/rrlite_enc3_tube_4x4.hip

@@ -8,9 +8,13 @@
 #define SWIN_MLP_R(NW) 2
 #endif
 // NGX can recycle a weights address for another tube block after feature
-// recreation. Address-only caching then serves stale packed weights. Prepare
-// each launch; the default single image is sufficient on the launch stream.
+// recreation. Address-only caching then serves stale packed weights, so
+// d4r_prep_key_at stays 0 (ZLUDA prepares every launch). MicroCUDA instead keys
+// preparation by allocation identity (d4r_prep_identity_at): one image per tube
+// weight set (6 per evaluation), re-prepared on any free/reallocation or write.
 #define SWIN_PREP_KEY_AT 0
+#define SWIN_PREP_IDENTITY_AT 1
+#define SWIN_PREP_SLOTS 8
 #include "swin_block.h"
 #ifndef SWIN_NW
 #define SWIN_NW 8