Quiet cleanup status child job output

[chubes4]

Summary

• Hide unbounded child job ID lists from default task-backed cleanup status output.
• Keep full diagnostic child job IDs available with --verbose and cleanup evidence.
• Rename the parent scheduler completion timestamp to parent_completed_at to avoid implying the whole run is complete.

Fixes #432

Testing

• php tests/smoke-worktree-cleanup-cli.php
• php -l inc/Cleanup/CleanupRunEvidenceStoreInterface.php inc/Cleanup/DataMachineJobCleanupRunEvidenceStore.php inc/Cli/Commands/WorkspaceCommand.php tests/smoke-worktree-cleanup-cli.php
• git diff --check
• homeboy test --path /Users/chubes/Developer/data-machine-code@fix-cleanup-status-output-noise --extension wordpress

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (openai/gpt-5.5)
• Used for: Implemented the cleanup status output changes and smoke test coverage; 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 bb6dae9

Test

✅ test — passed

ℹ️ Auto-fix lint issues: homeboy refactor data-machine-code --from lint --write
ℹ️ Collect coverage: homeboy test data-machine-code --coverage
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 bb6dae9

Audit

✅ audit — passed

• dead_code — 7 finding(s)
• intra-method-duplication — 6 finding(s)
• requested_detectors — 3 finding(s)
• test_coverage — 3 finding(s)
• parallel-implementation — 1 finding(s)
• repeated_literal_shape — 1 finding(s)
• structural — 1 finding(s)
• Total: 22 finding(s)

Deep dive: homeboy audit data-machine-code --changed-since bb6dae9

Tooling versions

• Homeboy CLI: homeboy 0.188.6+26105f3
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: 3b967d45
• Action: unknown@unknown