[CI] Restore green main after Clippy and generated-doc drift

[szmyty]

Outcome

Restore a truthful green main baseline before adding more Renderflow product surface.

Observed baseline

Checked on 2026-09-13 against main at 58aa2cad8ba9e2374d0e7a1bf5277052ae40838c.

Two current required checks are failing:

1. Build and test / Clippy
   • crates/renderflow-core/src/commands/build.rs
   • run_selection currently has eight parameters and fails under -D warnings with clippy::too_many_arguments.
2. Generated documentation drift
   • docs/user-guide/tool-registry.md does not match the canonical generator output.
   • The reported delta includes HandBrake and Lulu rules/capabilities.

The web checks, installer, Snap, and AUR jobs observed in the same baseline are succeeding. This is a focused baseline-repair issue, not a reopening of the older packaging incident resolved by #351.

Scope

• Refactor the wide run_selection call boundary into a typed request/options object, or document a narrower alternative that preserves behavior.
• Do not silence the lint globally or weaken -D warnings.
• Regenerate docs/user-guide/tool-registry.md through the canonical generator and commit the exact generated result.
• Confirm the underlying registry sources for HandBrake and Lulu are intentional and covered by the documentation contract.
• Add or strengthen a regression check if the current checks can drift without a locally reproducible failure.
• Run the complete required validation suite and record the evidence.

Acceptance criteria

• cargo fmt --check passes.
• Clippy passes with warnings denied for the same targets/features used in CI.
• The relevant unit/integration tests pass.
• The generated-document check is clean from a fresh checkout.
• No lint, documentation, or workflow gate is bypassed to obtain green status.
• Required GitHub Actions checks are green on the resulting main commit.
• Completion evidence is linked from this issue and reconciled with the universal artifact roadmap in Roadmap: universal artifact forest, maximal Renderflow profile, and Flow orchestration readiness #367.

Related work

• Roadmap: universal artifact forest, maximal Renderflow profile, and Flow orchestration readiness #367 — universal artifact forest and Flow-suite readiness
• [Publication] Add localization-ready layered page composition and locale render targets #406 — localization-ready layered page composition

[szmyty]

Implementation evidence (PR pending)

• Focused PR: fix(pipeline): restore validation baseline #408
• Pinned base: 58aa2cad8ba9e2374d0e7a1bf5277052ae40838c
• Current head: 15478e75862be680dc0e882aff3cafbe5aa56300
• The remote tree matches the fully validated local tree: 3a967ce4babaadc4df1c94e6dc1a9e9a5b7d3d21
• No dependencies, workflow gates, warning policy, or capability contracts changed.

Local validation passed for Rust 1.94 formatting, exact workspace Clippy with warnings denied, verbose workspace build, the complete workspace unit/integration/doc-test suite, locked fast conformance, all canonical docs/schema generators with a clean generated diff, strict MkDocs and Mike preview, the full web matrix, release/example checks, and checksum-verified installer smoke testing.

The canonical registry history confirms HandBrake (1db6150a) and Lulu (bb34bd27) are intentional existing providers; this PR only brings their generated reference rows back into sync.

The first hosted Commit Lint run found a commit-body line-length violation. The commit was amended without changing the tree, and latest-head checks are running:

• CI: https://github.com/egohygiene/renderflow/actions/runs/34775242408
• docs: https://github.com/egohygiene/renderflow/actions/runs/34775242483
• conformance: https://github.com/egohygiene/renderflow/actions/runs/34775242532
• commit lint: https://github.com/egohygiene/renderflow/actions/runs/34775248590

The PR is intentionally unmerged. Keep the main-branch acceptance item open until #408 is reviewed/merged and resulting-main evidence is observed; hosted execution may also need an account billing/quota follow-up. Reconciliation with #367: no new artifact capability or dependency was introduced, so its sequencing is unchanged.

[szmyty]

Hosted-check follow-up for head 15478e75862be680dc0e882aff3cafbe5aa56300: Commit Lint and Artifact conformance are now green. CI and docs remain in progress; the PR remains open and unmerged.