Maintenance release with bugfixes and performance improvements

What's Changed

• Refined attribution approach for C vs. Python by @emeryberger in #1001
• Fix Python 3.14 compatibility for eval()/exec() keyword arguments by @emeryberger in #1002
• Fix memory explosion and extreme slowness during profiling by @emeryberger in #1004

Full Changelog: v2.1.3...v2.1.4