Add the canonical workflow reference (docs/WORKFLOW.md): branch model
(main/develop + feature/fix/hotfix), Conventional Commits, SemVer, tagging,
and the three-environment strategy (native dev, Docker staging, Linux prod).
Seed VERSION (0.1.0) as the single source of truth and a Keep-a-Changelog
CHANGELOG.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
cesnimda