fix(bundle): mirror rebased handler throttles

[chubes4]

Summary

• Preserve locally lowered bundle flow max_items across both handler_config and handler_configs shapes during burn-in-safe rebases.
• Add smoke coverage for shape-transition rebases so local burn-in throttles do not split across equivalent handler config representations.

Testing

• php tests/agent-bundle-artifact-rebase-smoke.php
• php -l inc/Engine/Bundle/AgentBundleArtifactRebase.php && php -l tests/agent-bundle-artifact-rebase-smoke.php
• git diff --check

Notes

• homeboy lint --path /Users/chubes/Developer/data-machine@fix-bundle-rebase-max-items --extension wordpress still fails due to the existing repository-wide phpstan/phpcs backlog, including unrelated Agents API class discovery findings.

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Debugged the live bundle rebase dry-run issue, drafted the minimal code/test changes, and ran local smoke/syntax/whitespace verification for Chris to review.

[homeboy-ci]

Homeboy Results — data-machine

Lint

✅ lint — passed

ℹ️ Full options: homeboy docs commands/lint
Deep dive: homeboy lint data-machine --changed-since 7aef410

Test

✅ test — passed

ℹ️ Auto-fix lint issues: homeboy refactor data-machine --from lint --write
ℹ️ Collect coverage: homeboy test data-machine --coverage
ℹ️ Pass args to test runner: homeboy test -- [args]
ℹ️ Full options: homeboy docs commands/test
Deep dive: homeboy test data-machine --changed-since 7aef410

Audit

✅ audit — passed

• dead_code — 1 finding(s)
• parallel-implementation — 1 finding(s)
• test_coverage — 1 finding(s)
• Total: 3 finding(s)

Deep dive: homeboy audit data-machine --changed-since 7aef410

Tooling versions

• Homeboy CLI: homeboy 0.160.0+cdb45600
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: b382796
• Action: Extra-Chill/homeboy-action@v2