fix(ci): Add full debug info and slow unwinding for LSAN

- Add -Cdebuginfo=2 to ensure full debug symbols are generated
- Add ASAN_OPTIONS=symbolize=1 for proper symbolization
- Add fast_unwind_on_malloc=0 for more accurate stack traces
- Add print_suppressions=1 to debug which suppressions match

Author: xdustinface

.github/workflows/sanitizer.yml

@@ -26,11 +26,13 @@ jobs:
 
       - name: Run tests with ASAN
         env:
-          RUSTFLAGS: "-Zsanitizer=address"
+          RUSTFLAGS: "-Zsanitizer=address -Cdebuginfo=2"
           # Use llvm-symbolizer to get function names in stack traces
           ASAN_SYMBOLIZER_PATH: /usr/bin/llvm-symbolizer
-          # Suppress known tokio runtime leaks (thread-local storage, internal state)
-          LSAN_OPTIONS: "suppressions=${{ github.workspace }}/.github/lsan_suppressions.txt"
+          # Symbolize and use slow unwinding for better stack traces
+          ASAN_OPTIONS: "symbolize=1"
+          # Suppress known tokio runtime leaks, use slow unwinding for accurate traces
+          LSAN_OPTIONS: "suppressions=${{ github.workspace }}/.github/lsan_suppressions.txt:fast_unwind_on_malloc=0:print_suppressions=1"
         run: |
           # FFI crates (C interop)
           cargo +nightly test -Zbuild-std --target x86_64-unknown-linux-gnu \