v0.9.0

What's Changed

• Frequency-domain fitting: draggable fit-range span + correct peak seeding by @BenHuddart in #228
• Grouping preview: decimate the curve to fix the GUI freeze on large runs by @BenHuddart in #229
• Grouping window: stop the redundant second t0 scan under auto-detect by @BenHuddart in #230
• Fix flaky trend-provenance test + join orphaned worker threads at teardown by @BenHuddart in #231

Full Changelog: v0.8.0...v0.9.0