Harden Planemo support (pin + test-report schema + CLI pages + convert Mold)

[jmchilton]

Closes #238 stages 1-3 (stage 4 explicitly lazy per the issue).

Summary

• Pin planemo to jmchilton/planemo@a9b8b8bc7ab3b12035d53bdb5383fe450413d9f3 (PR Allow structured reasoning of Planemo command-line interface and certain outputs planemo#1636 merge commit). Galaxyproject doesn't carry the SHA yet — unpin once #1636 merges + releases.
• New @galaxy-foundry/planemo-test-report-schema: vendored JSON Schema for planemo test --test_output_json, AJV-2020-12 validator, validate-planemo-test-report CLI, two-step sync (planemo → JSON → TS) so contributor laptops never need planemo.
• New @galaxy-foundry/planemo-cli-meta: minimal vendored cli_metadata so the Foundry validator's cli-command allowlist treats planemo as a known source (parallels @galaxy-tool-util/cli/meta for gxwf).
• New scripts/sync-planemo-cli.ts: shells out to planemo cli_metadata --command <name>, generates content/cli/planemo/planemo-<name>.md with AUTO_BEGIN/END markers that preserve hand-edited ## Output / ## Examples / ## Gotchas.
• Seed CLI pages: planemo-{lint,test,workflow_test_init,workflow_test_on_invocation,cli_metadata,output_schema}.
• New schema note content/schemas/planemo-test-report.md.
• Rewrote convert Mold §10: convergence loop now runs planemo test --test_output_json, AJV-validates the report, classifies failures from tests[].data.status / data.problem_log / data.job instead of free-text. Deleted the deferred-manpages caveat.
• Cross-links into planemo-asserts-idioms, planemo-workflow-test-architecture, implement-galaxy-workflow-test.
• AGENTS.md "Vendored planemo artifacts" section: planemo only required when regenerating.
• make sync-planemo* / check-planemo-cli targets; .github/workflows/planemo-drift.yml CI gate.

Deviations from issue text

1. Filenames are planemo-<name>.md (prefixed) instead of bare <name>.md. The wiki-link resolver has no tool-scoped lookup; bare test.md would slug to test and [[planemo-test]] wouldn't resolve. Underscore preservation honored on the suffix (workflow_test_init).
2. Both scripts/sync-planemo-cli.ts AND packages/planemo-cli-meta/ were built (issue listed them as "or"). The validator hardcodes CLI_METADATA_KEYS from npm-imported metadata sources, so a workspace-imported planemo source is needed in parallel.
3. Sync scripts inside the new packages are .mjs (issue said "All sync logic TS"). Mirrors the tests-format-schema/scripts/sync-schema.mjs precedent; the top-level page generator IS TypeScript.

Open follow-ups

• Once planemo#1636 merges and ships, flip package_version to a PyPI version pin and strengthen availability_check to planemo cli_metadata --help.
• Generator hardcodes revised: 2026-05-11 / revision: 1 in regenerated frontmatter — needs a follow-up to preserve / bump those across regen.
• CI installs planemo via pip install, AGENTS.md tells humans uvx --from git+... — slight asymmetry.
• File optional --raw flag on planemo upstream for cleaner pipe-to-file ergonomics (open question in the issue).

Verification

• npm run validate — 0 errors, 132 warnings (all pre-existing).
• npm run packages-typecheck / packages-lint / packages-format — clean.
• pnpm --filter @galaxy-foundry/planemo-test-report-schema test — 5/5 passing.
• pnpm --filter @galaxy-foundry/planemo-cli-meta test — 3/3 passing.
• npm run check:planemo-cli (with pinned planemo) — no drift.

Pre-existing failures unrelated to this PR: packages/summarize-nextflow Sarek/rnaseq integration tests (commits 86197b5 / 11ec258) and tests/cli-registry.test.ts (needs npm --prefix site install first).

Test plan

• CI `Packages` workflow passes (validate, typecheck, packages-test, format, lint, build).
• CI `Planemo vendored drift` workflow passes (installs pinned planemo, runs --check on CLI pages, runs sync:from-planemo + diff gate on both packages).
• Manually install pinned planemo (`uvx --from git+https://github.com/jmchilton/planemo@a9b8b8bc7ab3b12035d53bdb5383fe450413d9f3 planemo --version`) and rerun `make sync-planemo` to confirm no drift.
• Spot-check the rendered Astro site for the new content/cli/planemo/ and content/schemas/planemo-test-report.md pages.

🤖 Generated with Claude Code