Add controlled primitive/literal dual-run evidence

[swernerx]

Summary

• add a release-profile controlled dual-run that executes the Go oracle and independent Rust primitive/literal producer twice over the same repository revision, compiler revision, corpus requests, capabilities, and budgets
• embed the deterministic structured conformance report and retain ordered runtime, resident-memory, artifact-size, and producer-output-size characterization samples
• replace the OXC CI conformance artifact with the complete rollout artifact and check in a reproducible local baseline
• record ADR-0020's decision that the category is not ready for a later authority decision

Rollout boundary

• Go remains the serving semantic authority and production fallback
• Rust remains shadow-only
• no authority switch
• no TS7 producer protocol change
• no external consumer behavior change
• no Palamedes change

The report keeps the four named unsupported selections, three expected recovery mapping gaps, absent production fallback/rollback exercise, non-equivalent measurement boundary, and missing isolated Go child RSS as explicit blockers.

Evidence

The checked rollout report contains two complete runs with byte-identical conformance payloads. It passes with 29/29 supported records, 1,000,000 ppm compatibility, 100/100 root identity matches, 25 mapped selections, three pinned recovery mapping gaps, and zero unexplained semantic, transport, or mapping differences.

Local validation

• RUSTUP_TOOLCHAIN=1.97.1 cargo fmt --manifest-path internal/oxc_reference/Cargo.toml --all -- --check
• RUSTUP_TOOLCHAIN=1.97.1 cargo clippy --locked --manifest-path internal/oxc_reference/Cargo.toml --all-targets -- -D warnings
• RUSTUP_TOOLCHAIN=1.97.1 cargo test --locked --manifest-path internal/oxc_reference/Cargo.toml (18 passed)
• RUSTUP_TOOLCHAIN=1.97.1 ./internal/oxc_reference/run-rollout.sh --output docs/evidence/primitive-literal-rollout-2026-08-17.json
• go test -count=1 ./internal/semanticfacts ./internal/tsfacts ./cmd/tsfacts
• go build -tags=noembed ./cmd/tsfacts
• npx hereby check:format
• npx hereby lint
• npx hereby test (full local Go suite passed with host FSEvents access; the uninitialized TypeScript submodule warning remains visible)
• npx hereby build
• npx hereby test:benchmarks
• npx hereby test:tools
• npx hereby test:api
• npm run extension:build

AI disclosure

This pull request was implemented with OpenAI Codex assistance and fully reviewed and validated locally before publication.

Closes #47