Changelog

Unreleased

add high-level orbit, ephemeris-time, and gravitational-parameter helpers
add Astro.Star catalog propagation and BCRS state-vector conversions with auditable ERFA warnings
serialize CSPICE-backed NIF access to prevent concurrent kernel/error-state races
run blocking SPICE-backed NIFs on dirty schedulers to protect BEAM scheduler responsiveness
harden native string input handling against embedded NULs and oversized binaries
normalize Julian-date datetime rounding across midnight to avoid invalid hour 24 values
remove hidden SPICE support result caps for spkobj, bodvcd, and bodvrd
tighten shared native utility include, allocation, and warning hygiene
consolidate native wrappers into one NIF with a single atomic CSPICE kernel pool
vendor the CSPICE N0067 Linux headers and static libraries for offline builds
convert the solar-system and nearby-stars examples into Livebooks
restructure the example Livebooks into staged tutorials with interleaved theory, per-function breakdowns, and intermediate SVG renders