feat: automate release workflow and add optional NUMA support

Refactor the Gitea release workflow to introduce a dedicated `create-release` job that exposes a shared release ID, eliminating redundant inline creation. Update the Makefile to automatically generate annotated tags with AI-derived markdown release notes from recent commits. Add an optional `numa` feature to `obikindex` that gates `hwlocality` behind conditional compilation, providing a graceful UMA fallback when disabled. Bump `obikmer` to v1.1.17.

Makefile

@@ -90,5 +90,8 @@ release: bump-version
 	@jj git push --change @
 	@new_version=$$(grep '^version = ' $(CARGO_TOML) | head -n 1 | sed 's/version = "\(.*\)"/\1/'); \
 	git_hash=$$(jj log -r @ --no-graph -T 'commit_id'); \
-	git tag "v$$new_version" "$$git_hash" && \
+	commits=$$(jj log -r 'latest(tags())..@' --no-graph -T 'description ++ "\n"' 2>/dev/null || \
+	           jj log --no-graph -T 'description ++ "\n"' --limit 30); \
+	notes=$$(printf 'Write concise markdown release notes for obikmer (a Rust kmer genomics tool). Be technical and direct. Base them strictly on these commit messages:\n\n%s' "$$commits" | aichat); \
+	git tag -a "v$$new_version" -m "$$notes" "$$git_hash" && \
 	git push origin "v$$new_version"