engine: presets E/F AutoExposure, the game's exposure fields and NGX's jitter order

NGX's CNN takes this frame's exposure scale and pre-exposure in both translated kernels (input words 244-256,
reconstruction 592-604) and the previous frame's exposure as the input kernel's texture 352
(cuda_copy_exposure_kernel's half surface). The runtime left all of it at the model dump's values, so HDR games
with a pre-exposure other than 1 or a changing exposure measured 18-39 dB against NGX; now 54-64 dB.

AutoExposure (flag 0x40), which the shim refused for E/F: NGX runs K's log-mean measurement on M's grid every
second frame. exposure_k.comp MODE 3 writes it to the 1x1 image the kernels sample; sr/exposure_copy_e.comp
keeps the previous exposure. 60-66 dB over eleven frames at 960x540 -> 1920x1080, pre-exposure 19-21.

The reconstruction's jitter words 544-556 are (y, x); the runtime wrote (-x, -y), which matches only the
harness's first three jitters, so every later frame of a game's jitter sequence measured 26-28 dB. Twelve-frame
captures now measure 60-66 dB HDR and LDR; on the Steam Deck through the shim 51-67 dB against ZLUDA.

The D3D12 harness takes per-frame lists in D4R_HARNESS_PRE_EXPOSURE / _EXPOSURE_SCALE; d4r-e takes the
AutoExposure flag, per-frame exposure values and the game's exposure texture. E/F models need rebuilding
(the install's model cache key changes); older models keep the old binding and refuse AutoExposure.

config/d4r.ini.default

@@ -144,7 +144,7 @@ MarkerPollUs = auto
 ; Needs VkD3DDir, a driver with VK_KHR_cooperative_matrix (Mesa RADV on RDNA3/RDNA4) and the model folders
 ; (RuntimeDir/engine/k, k-ldr, m, m-ldr, l, l-ldr; scripts/install_d4r_runtime.sh). E and F (engine/e, engine/f;
 ; D4R_ENGINE_MODEL_E_DIR, D4R_ENGINE_MODEL_F_DIR) need no cooperative matrices: they run on RDNA2 (Steam Deck)
-; too, from any render size and HDR or LDR, but not with AutoExposure. A game or setting the engine
+; too, from any render size and HDR or LDR, with AutoExposure too (models built by this version). A game or setting the engine
 ; does not cover uses the normal path, with the reason in d4r_nvngx.log: other models than E, F, K, L and M,
 ; display-resolution motion vectors with L or M, or a K model built before the current engine/compile_k.py for display-resolution
 ; motion, non-inverted depth or exposure supplied by the game. Details and measurements: engine/README.md.