docs: reconcile implementation task status

[rogerchappel]

Summary

• mark checked-in package, parser, analyzer, reporter, CLI, fixture, test, and documentation work complete
• retain the GitHub description/topics follow-up as explicitly unfinished
• update the PRD stage to distinguish the implemented MVP from pending npm publication
• add a lightweight validation guard against regressing core capabilities to unchecked or the PRD to in-progress

Commits

• 6bbf366 test: guard implemented task documentation
• 64f82a1 docs: reconcile implementation status

Verification

• npm ci
• npm run release:check (6 files, 123 tests; build, lint, smoke, validation, package smoke)
• git diff --check origin/main...HEAD
• author and committer identity verified for every commit as Roger Chappel <miscanalysis@gmail.com>

[rogerchappel]

Automated merge note

Triage class: auto-merge

Summary: Reconciles implemented package, parser, analyzer, reporter, CLI, fixture, test, and documentation tasks while retaining genuinely pending GitHub metadata and npm publication work; adds a focused stale-status validation guard (4 files, +77/-48).

Checks run: GitHub Actions CI / test (20.19.0), CI / test (22), and CI / test (24) — all COMPLETED/SUCCESS; worker verification from the isolated worktree reported npm ci, npm run release:check (6 files, 123 tests, build, lint, smoke, validation, package smoke), and git diff --check origin/main...HEAD passed; final diff, mergeability, branch protection, and Roger Chappel commit identity re-verified.

Rebased/CI-repaired: No.

Verified head SHA: 64f82a19698c39b3fe75df7e0522c7e8febe3cb1.