Initial project import

RELEASE_CHECKLIST.md

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+# Public Release Checklist
+
+- [ ] Start from this clean directory, not the private repository history.
+- [ ] Confirm no private units or internal notes are present.
+- [ ] Run a secret scanner against files and Git history.
+- [ ] Run `make test`.
+- [ ] Confirm the copyright owner and license choice.
+- [ ] Add only public screenshots, logos, and assets.
+- [ ] Tag the release, for example `v0.1.0-alpha`.