fix(pipeline): restore validation baseline

[szmyty]

Summary

• replace the eight-argument build-selection call with typed BuildOptions and BuildTargetOverride values while preserving CLI precedence and exclusion parsing
• regenerate the canonical tool-registry reference so the intentional HandBrake and Lulu providers/capabilities are documented
• repair the formatting, graph-fixture, structured-error-evidence, and strict-doc failures that were masked behind the first Clippy/docs failures
• leave CI workflows and warning/validation gates unchanged

Pinned starting point

• main: 58aa2cad8ba9e2374d0e7a1bf5277052ae40838c
• no open Renderflow PRs at the pre-push re-check
• HandBrake provenance: 1db6150ab5e4347afa74505d58459cdca3f08fb3
• Lulu provenance: bb34bd2765586c02c77cc5f5828bb71c4c408385
• dependency changes: none

Validation

• cargo fmt --all -- --check
• cargo clippy --workspace -- -D warnings
• cargo build --workspace --verbose
• cargo test --workspace (including unit, integration, and doc tests)
• fast locked golden conformance plus JSON report validation
• all five canonical docs/schema generators followed by git diff --exit-code
• mkdocs build --strict
• Mike versioned-docs preview smoke test and temporary-branch cleanup
• frozen pnpm install; web format, lint, typecheck, 14 tests, and production build
• release CLI build; hello-world/transforms dry runs; library/plugin examples
• portable installer checksum and version smoke test

GitHub-hosted checks may be unavailable because of account billing/quota; the repository gates themselves are unchanged, and the local equivalent evidence above is complete.

Closes #407
Relates to egohygiene/flow#11
Relates to #367

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