fix: expose scoped artifact cleanup apply command

[chubes4]

Summary

• Add a machine-readable apply_command to artifact cleanup dry-run results so JSON callers can apply the same reviewed bounded page.
• Preserve artifact cleanup page scope in the command with --limit, --offset, or --exhaustive.
• Update low-level direct-apply refusal and human dry-run output to point at the exact high-level cleanup command.

Closes #615.

Verification

• php tests/smoke-worktree-cleanup-artifacts.php
• php tests/smoke-worktree-cleanup-cli.php
• php -l inc/Workspace/WorkspaceArtifactCleanup.php && php -l inc/Cli/Commands/WorkspaceCommand.php && php -l tests/smoke-worktree-cleanup-artifacts.php && php -l tests/smoke-worktree-cleanup-cli.php

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Drafted the code/test changes and ran targeted verification; Chris remains responsible for review and merge.

[homeboy-ci]

Homeboy Results — data-machine-code

Lint

✅ lint — passed

ℹ️ Full options: homeboy docs commands/lint
ℹ️ Save lint baseline: homeboy lint data-machine-code --baseline
Deep dive: homeboy lint data-machine-code --changed-since 551353d

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-code-lint-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-code-lint-quality-Linux-node24 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/data-machine-code/actions/runs/27234001375

Test

❌ test — failed

ℹ️ No tests ran — the runner failed before producing results. See raw_output.stderr_tail / raw_output.stdout_tail for the underlying error (bootstrap failure, missing deps, DB connection, etc.).
ℹ️ To run specific tests: homeboy test data-machine-code -- --filter=TestName
ℹ️ Auto-fix lint issues: homeboy refactor data-machine-code --from lint --write
ℹ️ Collect coverage: homeboy test data-machine-code --coverage
ℹ️ Analyze failures: homeboy test data-machine-code --analyze
ℹ️ Pass args to test runner: homeboy test -- [args]
ℹ️ Full options: homeboy docs commands/test
Deep dive: homeboy test data-machine-code --changed-since 551353d

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-code-test-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-code-test-quality-Linux-node24 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/data-machine-code/actions/runs/27234001375

Audit

✅ audit — passed

• audit — 27 finding(s)
• Total: 27 finding(s)

Deep dive: homeboy audit data-machine-code --changed-since 551353d

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-code-audit-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-code-audit-quality-Linux-node24 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/data-machine-code/actions/runs/27234001375

Tooling versions

• Homeboy CLI: homeboy 0.227.3+ade6a0c
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: 7bd871d3
• Action: unknown@unknown

[chubes4]

CI homeboy / Test is currently blocked by an upstream WP Codebox generated-runner parse error, not by this DMC change.

Root cause: wordpress.phpunit generated invalid PHP for pg_resolve_runtime_cwd():

str_replace('\', '/', $cwd)

That reproduces the CI failure shape:

PHP Parse error: syntax error, unexpected single-quoted string ") {", expecting ")" in /internal/eval.php on line 287

Upstream fix: Automattic/wp-codebox#860

Local verification with the fixed WP Codebox worktree wired into Homeboy passed:

HOMEBOY_WP_CODEBOX_BIN=/Users/chubes/Developer/wp-codebox@fix-escape-phpunit-cwd-backslash/packages/cli/dist/index.js \
HOMEBOY_WP_CODEBOX_CORE_MODULE=/Users/chubes/Developer/wp-codebox@fix-escape-phpunit-cwd-backslash/packages/runtime-core/dist/index.js \
homeboy --force-hot --allow-local-hot test data-machine-code \
  --path /Users/chubes/Developer/data-machine-code@fix-issue-615-cleanup-artifacts-dry-run-apply \
  --changed-since origin/main

Result: success: true, status: passed.