fix: add explicit discard for unpushed cleanup worktrees

[chubes4]

Summary

• Add explicit --discard-unpushed / discard_unpushed support for bounded cleanup-eligible apply so operators can intentionally discard unpushed commits without weakening --force.
• Preserve default safety: unpushed cleanup-eligible worktrees are still skipped unless the new data-loss flag is present.
• Emit exact discard evidence, including handles, unpushed counts before removal, and path-exists-after status.

Fixes #737.

Verification

• php -l inc/Workspace/WorkspaceWorktreeCleanupEngine.php && php -l inc/Cli/Commands/WorkspaceCommand.php && php -l inc/Abilities/WorkspaceAbilities.php && php -l inc/Tasks/WorktreeCleanupChunkTask.php && php -l tests/smoke-worktree-bounded-cleanup-eligible-apply.php && php -l tests/smoke-worktree-cleanup-cli.php
• php tests/smoke-worktree-bounded-cleanup-eligible-apply.php
• php tests/smoke-worktree-cleanup-cli.php

[homeboy-ci]

Homeboy Results — data-machine-code

Lint

✅ lint — passed

ℹ️ Full options: homeboy docs commands/lint
Deep dive: homeboy lint data-machine-code --changed-since 2519ac3

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/27585416317

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 2519ac3

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/27585416317

Audit

✅ audit — passed

• audit — 51 finding(s)
• Total: 51 finding(s)

Deep dive: homeboy audit data-machine-code --changed-since 2519ac3

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/27585416317

Tooling versions

• Homeboy CLI: homeboy 0.232.0+8fd2b92d870e+35bd476
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: 97d0a4d2
• Action: unknown@unknown