Fix MIOPEN_FIND_ENFORCE: 3 -> 1 (DB_UPDATE)

Enforce=3 (SEARCH_DB_UPDATE) runs exhaustive kernel benchmarking on
every single GPU operation, making inference impossibly slow. Enforce=1
searches once, writes to cache, then reuses cached results on all
subsequent calls.

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

docker-compose.yml

@@ -25,9 +25,9 @@ services:
       - miopen_cache:/app/miopen_cache
     environment:
       - HF_HUB_ENABLE_HF_TRANSFER=1
-      # MIOpen: only select solvers that fit in available workspace (stops
-      # the GemmFwdRest workspace warnings and the slow fallback path).
-      - MIOPEN_FIND_ENFORCE=3
+      # MIOpen: search for best solver once and cache (1=DB_UPDATE).
+      # Never use 3 (SEARCH_DB_UPDATE) in production - it benchmarks on every call.
+      - MIOPEN_FIND_ENFORCE=1
       # Persist MIOpen's kernel cache so it doesn't recompile on every start.
       - MIOPEN_USER_DB_PATH=/app/miopen_cache
       - MIOPEN_CUSTOM_CACHE_DIR=/app/miopen_cache