[mod:detroitbecomehuman] Add experimental Vulkan HDR, ultrawide, and DLAA support

[decoded-brain]

Summary

• Adds an experimental Vulkan RenoDX addon for Detroit: Become Human with HDR tone mapping, separate Scaleform UI brightness replacements, HDR-safe CAS handling, reversible ultrawide support, and opt-in NVIDIA NGX DLAA.
• Adds an exact-build-gated local Vulkan layer and launcher for the DLAA path. Incomplete or rejected temporal frames fail closed to Detroit's native TAA.
• Adds the Vulkan resource/readback fixes and regression coverage required by this game path.

Render path

• The scene replacement targets compute shader 0xEBFBDDB1 before Detroit's native Rec.2020/PQ output tail. It supplies a non-negative linear scene signal and the vanilla graded linear result to ToneMapPass; this is not an inverse tonemap of the completed SDR backbuffer.
• Three separately registered Scaleform replacements adjust UI RGB in Detroit's measured pre-PQ display-light domain while preserving the native alpha paths.
• Output Mode defaults to Auto and follows the native Vulkan swapchain. The explicit SDR and HDR10 choices select matching shader behavior but do not switch Windows HDR.
• Preset Off restores the vanilla tonemap/grade, native TAA, and native CAS behavior. Ultrawide remains an independent compatibility option; Aspect Ratio: Vanilla 16:9 disables that override.
• Automatic ultrawide support is signature-gated to the supported executable and restores the original instructions during teardown.

Validation

Supported profile:

• Steam Build ID 12158144
• DetroitBecomeHuman.exe size: 57,986,328 bytes
• DetroitBecomeHuman.exe SHA-256: ECF52321921387E683904E089082D76B973326FC093AF14E524056715519C1CF
• Vulkan x64 with ReShade 6.8.0 Full Add-On; metadata range is >=6.8.0 <6.9.0

Automated checks run from this branch:

• cmake --build --preset clang-x64-debug --target detroitbecomehuman detroitbecomehuman_dlss_layer detroitbecomehuman_dlss_launcher renodx_test_suites
• cmake --build --preset clang-x64-release --target detroitbecomehuman detroitbecomehuman_dlss_layer detroitbecomehuman_dlss_launcher
• ctest --test-dir build -C Debug --output-on-failure --parallel 4: 41/41 passed, including 16 Detroit tests and the shared Vulkan resource/readback regressions
• clang-format --dry-run --Werror --style=file: all 37 changed C/C++/shader files passed
• metadata.json validated against the repository draft 2020-12 schema; both metadata URLs were also parsed as absolute HTTP(S) URLs
• 18 generated embed headers/SPIR-V artifacts were checked for presence, non-zero size, alignment, and SPIR-V magic
• git diff --check passed; no tracked scratch dumps, generated binaries, graph output, or local workspace paths are included

Runtime evidence from ReShade 6.8.0.2155:

• The addon registered with five custom shader replacements and 20 injections on Vulkan.
• The current log built replacement pipelines for the scene shader and all three UI shaders. The HDR CAS replacement was registered but was not hit in that capture.
• Detroit recreated the swapchain as VK_COLOR_SPACE_HDR10_ST2084_EXT.
• At 3440x1440, the reversible aspect override reported the exact 2.388889 ratio and 0.671875 UI scale.
• A valid native-resolution b16 DLAA replacement was observed at frame 2899, followed by exact command-list DLAA sharpening gates. Earlier incomplete descriptor state remained on native TAA as intended.
• This runtime capture predates the final formatting-only cleanup commit. Local 3440x1440 PNG screenshots were used only as menu/UI layout evidence; they are not HDR luminance or color-volume measurements.

Known limits

• This remains experimental and is restricted to the exact Steam build and executable hash above.
• Late chapters have not been validated.
• DLAA is not claimed to work on every pass or resource format; unsupported or unverified frames intentionally retain native TAA.
• Separate UI replacement pipelines were observed, but UI-nit accuracy and HDR peak luminance were not instrument-measured.
• This does not claim full-game compatibility. Auto HDR and NVIDIA RTX HDR must remain disabled, and the game must be fully restarted after adding, replacing, or removing the addon.