Shorten the public README to the essential project description, build commands, run targets, current status, and directory map. The content stays focused on the contest repository without extra background or planning prose.

Constraint: Protected GitLab main branch rejects force pushes, so the remote history cannot be rewritten from this workspace.

Rejected: Force-push cleaned history | GitLab pre-receive hook blocks force pushes to protected main.

Confidence: high

Scope-risk: narrow

Tested: Reviewed README diff before committing.

Not-tested: README-only change; no build rerun.