Fix high-volume workspace cleanup planning

[chubes4]

Summary

• Makes retention cleanup planning include a full-workspace artifact inventory by default, without requiring manual artifact offset paging.
• Reports total reclaimable bytes up front, with separate artifact-cleanup and worktree-removal byte buckets plus largest-win summaries.
• Surfaces kept/blocked artifact and worktree paths separately with stable reason codes, and dedupes duplicate worktree scan rows before classification.

Fixes #674.

Verification

• php tests/smoke-workspace-cleanup-plan-high-volume.php
• php tests/smoke-worktree-cleanup-cli.php
• php tests/smoke-worktree-cleanup.php
• php -l inc/Workspace/WorkspaceCleanupPlan.php
• php -l inc/Workspace/WorkspaceArtifactCleanup.php
• php -l inc/Cli/Commands/WorkspaceCommand.php
• php -l inc/Workspace/WorkspaceWorktreeCleanupEngine.php
• php -l tests/smoke-workspace-cleanup-plan-high-volume.php

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (openai/gpt-5.5)
• Used for: Drafted the cleanup planning implementation, smoke test coverage, and verification commands for Chris to review.

[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 8ce5ebc

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/27471061789

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 Save test baseline: homeboy test data-machine-code --baseline
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 8ce5ebc

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/27471061789

Audit

✅ audit — passed

• audit — 32 finding(s)
• Total: 32 finding(s)

Deep dive: homeboy audit data-machine-code --changed-since 8ce5ebc

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/27471061789

Tooling versions

• Homeboy CLI: homeboy 0.228.22+c939469
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: c555adf8
• Action: unknown@unknown