Diagnose srs cache reuse in CI

.github/workflows/check-generated-files.yml

@@ -37,6 +37,19 @@ jobs:
         uses: ./.github/actions/setup-srs
         with:
           artifact-cache-scope: github-linux-dev
+      - name: "Diagnose srs artifact cache"
+        env:
+          CARGO_LOG: cargo::core::compiler=debug
+          CARGO_TARGET_DIR: ${{ runner.temp }}/srs-artifact-cache-probe
+        run: |
+          echo "Loader environment:"
+          env | rg '^(GLIBC_TUNABLES|LD_|DYLD_)=' || true
+          echo "Restored srs cache:"
+          du -sh ~/.cargo/srs-artifact-cache-v2 || true
+          find ~/.cargo/srs-artifact-cache-v2 -type f | wc -l
+          set -o pipefail
+          cargo build --package uv-static --lib 2>&1 \
+            | rg 'artifact cache|Compiling|Finished'
       - name: "Generate all"
         run: cargo dev generate-all --mode dry-run
       - name: "Check sysconfig mappings"