v0.3.8

What's Changed

• feat: observable clustering with optional lightcone size budget by @stephendiadamo in #41
• feat: adjoint Jacobian, VJP and batched expectation values by @stephendiadamo in #42
• Fix mixed-type auto deduction in Sampling.cpp on macOS by @stephendiadamo in #43
• Add observables parameter to mirror_fidelity by @stephendiadamo in #44

Full Changelog: v0.3.7...v0.3.8