Some features still need regression tests

[bprather]

Masterlist of things I've said "that needs a test" about

• [ ] Multizone regression test, e.g. match a magnetized Bondi solution after a few iterations
• [x] Restart w/EMHD enabled
• [ ] Restart w/Electrons enabled
• [x] Restart w/Face-CT enabled
• [x] Restart w/SMR enabled
• [x] SMR modes convergence
• [ ] SMR keeps divB with wacky O-T vortex meshblock breakdown
• [x] SMR keeps divB in small 3D torus problem
• [ ] SMR convergence on more tests, e.g. Bondi
• [ ] Re-enable all electrons tests not currently run w/CI, with real failure criteria
• [ ] Komissarov blast with outflow boundary conditions
• [ ] Spherical grid with outflow conditions, outflowing/polar blob
• [ ] Mid-MAD test for continued agreement with iharm3d in that mode
• [ ] Hubble flow. Implemented but has a bug in the source/boundary
• [ ] 2D driven turbulence for e- heating
• [ ] "Shadow" test of relative e- entropy in a full 2D SANE model
• [ ] Field loop advection in Cartesian
• [ ] Field loop advection across pole
• [ ] MHD modes across pole
• [ ] P->U->P direct inverter tests
• [ ] Tests that reductions are calculated correctly by checking history file

[vedantdhruv96]

@samason4 has recently implemented restart with electrons and I believe he has tested it. He could open a PR to dev.