Fix DLSS artifacts and improve synchronization diagnostics

- Fix Cyberpunk 2077 preset-K black artifacts by preserving FP16/FP64
  denormal requirements while limiting denormal suppression to FP32.

- Fix stale direct-output redirects after array destruction, preventing
  reused handles from inheriting an earlier feature's output buffer.

- Log rejected resource formats and dimensions, including failures after
  startup, with rate limiting for repeated errors.

- Add opt-in blocking output synchronization with a dedicated bridge
  export and fallback to context synchronization.

- Report output-wait CPU and wall time, and defer GPU timing queries
  until asynchronous evaluation has completed. The CPU-overhead
  mitigation for #7 still needs reporter confirmation.

- Reject release libraries requiring GLIBC newer than the configured
  baseline, defaulting to 2.41, and document compatible builds.

Validation: shim and bridge builds pass; targeted redirect-lifetime and
format-logging checks pass.

Fixes #5
Fixes #8
Refs #7

docs/building.md

@@ -27,6 +27,13 @@ cp target/release/libnvcuda.so ~/.cache/d4r-zluda-current/
 ln -sf libnvcuda.so ~/.cache/d4r-zluda-current/libcuda.so
 ```
 
+Build the release ZLUDA library on a system or in a container with GLIBC 2.41 or older. A binary
+linked on a newer system can require newer GLIBC symbols even when the ZLUDA source does not need new
+GLIBC features. Before packaging, check it with
+`scripts/check_glibc_compat.sh 2.41 /path/to/libnvcuda.so`. The release packager runs the same
+check on ZLUDA, the Wine CUDA bridge, and every bundled ROCm library. Test the rebuilt library
+with the D3D12 harness and in a game before publishing a release.
+
 The launcher looks for ZLUDA in `D4R_ZLUDA_DIR` (default `~/.cache/d4r-zluda-current`, or `ZludaDir` in d4r.ini).
 
 What the patches add: