fix(build): seed CHANGELOG.md with version entry for release-please frontmatter preservation

[WilliamBerryiii]

Summary

Fixes #169

Seeds CHANGELOG.md with a placeholder version entry so release-please preserves YAML frontmatter during changelog updates.

Problem

PR #168 fails markdown linting because CHANGELOG.md had no version entry. When release-please's updateContent() method runs without a matching version header ('\n###? v?[0-9[]'), it takes the "no version found" code path which:

1. Prepends # Changelog\n header
2. Adds the new changelog entry
3. Calls adjustHeaders() on all existing content (including frontmatter)
4. Appends adjusted content at the end of the file

This mangles the YAML frontmatter, causing MD003, MD012, MD013, and MD022 lint failures.

Solution

Add ## 0.0.0 (Initial) placeholder version entry. This triggers release-please's "version found" path:

const lastEntryIndex = content.search(versionHeaderRegex);
const before = content.slice(0, lastEntryIndex);   // Frontmatter preserved
const after = content.slice(lastEntryIndex);       // Only versions processed

return `${before}\n${this.changelogEntry}\n${adjustHeaders(after)}`;

The frontmatter stays in the protected before slice and is preserved exactly as-is.

Changes

• CHANGELOG.md - Added ## 0.0.0 (Initial) placeholder version entry

Testing

• ✅ npx markdownlint-cli2 CHANGELOG.md passes with 0 errors

Next Steps

After merging this PR:

1. Close PR chore(main): release hve-core 1.1.0 #168
2. Release-please will regenerate with the corrected algorithm

References

• release-please changelog.ts - updateContent() algorithm

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[Copilot]

Pull request overview

This PR seeds CHANGELOG.md with a placeholder version entry to fix frontmatter preservation issues with release-please. When no version entry exists, release-please's update algorithm mangles YAML frontmatter by treating it as content to be processed. Adding ## 0.0.0 (Initial) triggers the correct code path that preserves frontmatter in a protected slice.

Changes:

• Added placeholder version entry to prevent frontmatter mangling during changelog updates