Enhancements
- Jemalloc arena pool recycling. Arenas returned to the free pool are reset and purged instead of being destroyed, with updated jemalloc build options. New metrics report arena pool releases and reclaimed bytes (
prompp_common_jemalloc_arena_pool_*).
Other
- GCC 14 C++ toolchain. The CI/devcontainer image and Bazel configuration on this branch build the C++ core with GCC 14.