Add CHANGELOG (v1.0.0)

build: sonar_visual_dataset@92b4392
github: sovis-dataset@e0e4b20

CHANGELOG.md

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+# Changelog
+
+Versions are the same on GitHub (git tags and releases) and on Hugging Face (dataset tags). Load a fixed version with `load_dataset("weitung1121/SOVIS", revision="v1.0.0")`.
+
+* **MAJOR**: existing data, labels, splits or field meanings change, so published results are no longer comparable.
+* **MINOR**: something is added (labels, dives, configs, fields) and existing rows are unchanged.
+* **PATCH**: documentation and tool fixes; the data is unchanged.
+
+## Unreleased
+
+## v1.0.0 (2026-10-03)
+
+First public release.
+* 69,481 synchronized camera–sonar pairs (2.1 h) from 17 dives at 6 sites in the Trondheimfjord; train / validation / test split by site.
+* 706 camera fish boxes on 514 frames, 306 of them matched to sonar boxes; fish train and test sets on different dives.
+* 106,059 raw Oculus M750d pings as the original messages.
+* Configs `frames`, `mini`, `fish`, `sessions`, `highlights`, `raw_pings`; helpers `tools/sovis.py` and `tools/show_samples.py`.