ModelingToolkitBase-v1.68.0

ModelingToolkitBase ModelingToolkitBase-v1.68.0

Diff since ModelingToolkitBase-v1.67.0

Merged pull requests:

• Guard write_possibly_indexed_array! against zero-length parent arrays (#4986) (@raysong360)
• test: disable inline linear SCCs in linearization DD test (#4992) (@AayushSabharwal)
• docs: add internal docs page for mtkcompile (#4993) (@AayushSabharwal)
• Raise ModelingToolkitBase DelayDiffEq floor (#4994) (@ChrisRackauckas-Claude)
• Raise ModelingToolkitBase DelayDiffEq floor to 6.1.2 (#4995) (@ChrisRackauckas-Claude)
• Route sublibrary groups from the root test harness (#4998) (@ChrisRackauckas-Claude)
• Reduce TTFX for event-free system problems (#4999) (@ChrisRackauckas-Claude)
• docs: remove stale API binding and fix MTK compiler typos (#5003) (@ChrisRackauckas-Claude)
• docs: define the AbstractSystem implementation contract (#5004) (@ChrisRackauckas-Claude)
• Fix FMI version detection and tuple status handling in @statuscheck (#5007) (@asinghvi17)
• Restore the intentional MiscSystemData and generate_trajectory exports (#5009) (@ChrisRackauckas-Claude)
• Bump versions for release (#5010) (@ChrisRackauckas)

Closed issues:

• Root test harness does not route ModelingToolkitBase-prefixed groups (#4997)