Suppress MIOpen workspace warning noise via MIOPEN_LOG_LEVEL=2

The GemmFwdRest workspace=0 warnings are expected (PyTorch ROCm passes
null workspace; MIOpen falls back to a working solver). They are not
actionable and clutter the logs. Level 2 keeps error-level output.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -36,6 +36,9 @@ services:
       # Disable MLIR-based ImplicitGEMM solvers. These compile MLIR kernels on the
       # fly and hit 'too many open files' during the exhaustive benchmark search.
       - MIOPEN_DEBUG_CONV_IMPLICIT_GEMM=0
+      # Suppress MIOpen workspace=0 fallback warnings (errors still shown).
+      # Levels: 0=quiet 1=fatal 2=error 3=warning(default) 4=info 5=debug
+      - MIOPEN_LOG_LEVEL=2
       # - HF_TOKEN=your_token_here
 
 volumes: