test(cli): centralize LintArgs and TestArgs fixtures

[chubes4]

Closes #11948

Summary

• add feature-gated canonical for_test constructors with explicit component and path inputs
• centralize absent internal CLI fields, including release_readiness_source
• migrate self-check and component-script test literals

Validation

• cargo fmt --all -- --check
• cargo test -p homeboy-cli test_fixture_keeps_target_explicit_and_internal_source_absent
• cargo test --test self_checks_test
• cargo test --workspace --all-targets --no-run
• cargo test -p homeboy-cli component_script_test runs 17 passing tests; one existing environment-dependent test fails because its isolated extension directory lacks rust.json
• cargo clippy -p homeboy-cli --all-targets -- -D warnings is blocked by three existing homeboy-core warnings

AI assistance

OpenAI gpt-5.6-terra via OpenCode designed the feature-gated fixture boundary, migrated test literals, and ran validation. Chris Huber remains responsible for every line.

[homeboy-ci]

Homeboy Results — homeboy

Lint

✅ review lint — passed

ℹ️ Full options: homeboy self docs commands/lint
ℹ️ Save lint baseline: homeboy review lint homeboy --baseline
Deep dive: homeboy review lint homeboy --changed-since 9d0dd2a

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-homeboy-review-lint-homeboy-fast-Linux contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-homeboy-review-lint-homeboy-fast-Linux contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/homeboy/actions/runs/31249039257

Audit

⚠️ review audit — no measurement

Deep dive: homeboy review audit homeboy --changed-since 9d0dd2a

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-homeboy-review-audit-homeboy-fast-Linux contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-homeboy-review-audit-homeboy-fast-Linux contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/homeboy/actions/runs/31249039257

Tooling versions

• Homeboy CLI: homeboy 0.334.0+137320c5842f-dirty
• Extension: rust from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: 14fe68af
• Action: unknown@unknown