feat: display batch parent/child relationships on Jobs page

[chubes4]

Summary

Implements batch parent/child job hierarchy on the Jobs admin page. Closes #569.

• Child jobs hidden by default from the top-level list via hide_children filter — no more clutter
• Batch parent badge shows progress from engine_data.batch_results: "12/15 completed, 2 failed, 1 skipped"
• Expandable child rows — click a parent job to lazy-load and display its children inline
• Child job indicators — indented rows with ↳ arrow linking back to the parent

Changes

Backend (3 files)

• JobsOperations.php — Added parent_job_id and hide_children WHERE clauses to both get_jobs_for_list_table() and get_jobs_count()
• Jobs.php (REST API) — Registered parent_job_id (integer) and hide_children (boolean) params on GET /jobs, passed through in handle_get_jobs()
• GetJobsAbility.php — Pass-through for both new filters into the DB layer

Frontend (4 files)

• api/jobs.js — fetchJobs() now sends hide_children=1 by default; new fetchChildJobs(parentJobId) function
• queries/jobs.js — New useChildJobs(parentJobId) hook with lazy loading (enabled: !!parentJobId), new children query key
• JobsTable.jsx — Rewritten with JobRow, BatchBadge, ChildRows components. Batch parents are clickable with expand/collapse state. Child rows render indented with status
• jobs-page.css — Batch badge styles (complete/warning/progress variants), child row indentation, expand/collapse visual states

Technical Notes

• parent_job_id column is already indexed (KEY parent_job_id)
• engine_data.batch and engine_data.batch_results are set by PipelineBatchScheduler — no changes needed there
• Child jobs are fetched ASC by job_id for chronological display
• The hide_children filter uses (parent_job_id IS NULL OR parent_job_id = 0) to handle both NULL and zero values

[github-actions]

Homeboy Results — data-machine

Lint

⚡ Scope: changed files only

✅ lint (changed files only)

Test

Failure Digest

Test Failure Digest

• Failed tests: 3
• No structured test failure details available.
• Full test log: https://github.com/Extra-Chill/data-machine/actions/runs/23196531460

Autofixability classification

• Overall: human_needed
• Autofix enabled: no
• Autofix attempted this run: no
• Human-needed failed commands:
  • test
• Failed commands with available automated fixes:
  • test
• Automated fixes are disabled for this step. Commands with available fix support in this run: test

Machine-readable artifacts

• homeboy-lint-summary.json
• homeboy-test-failures.json
• homeboy-audit-summary.json
• homeboy-autofixability.json

⚡ Scope: changed files only

❌ test (changed files only)

Audit

⚡ Scope: changed files only

✅ audit (changed files only)

Tooling versions

• Homeboy CLI: homeboy 0.81.1+12f68f1f
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: unknown
• Action: Extra-Chill/homeboy-action@v1

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Homeboy Action v1