Refactor flow step config contract

[chubes4]

Summary

• Require canonical flow-step config shapes: handler-backed steps use handler_slugs/handler_configs, handler-free steps use flow_step_settings.
• Remove singular handler_slug/handler_config fallback reads from flow-step helpers, bundle adapters, workflow builders, and CSV import restore.
• Update workflow/bundle smoke fixtures and agent-facing copy to the canonical contract.

Verification

• homeboy lint --changed-since origin/main
• homeboy test --changed-since origin/main

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Drafted and verified the flow-step config contract refactor; Chris remains responsible for review and merge.

[homeboy-ci]

Homeboy Results — data-machine

Lint

✅ lint — passed

ℹ️ Full options: homeboy docs commands/lint
Deep dive: homeboy lint data-machine --changed-since 286ac3c

Test

✅ test — passed

• 806 passed
• 3 skipped

ℹ️ Auto-fix lint issues: homeboy refactor data-machine --from lint --write
ℹ️ Collect coverage: homeboy test data-machine --coverage
ℹ️ Save test baseline: homeboy test data-machine --baseline
ℹ️ Pass args to test runner: homeboy test -- [args]
ℹ️ Full options: homeboy docs commands/test
Deep dive: homeboy test data-machine --changed-since 286ac3c

Audit

✅ audit — passed

• requested_detectors — 163 finding(s)
• test_coverage — 37 finding(s)
• dead_code — 27 finding(s)
• intra-method-duplication — 10 finding(s)
• dead_guard — 3 finding(s)
• parallel-implementation — 2 finding(s)
• repeated_literal_shape — 2 finding(s)
• structural — 2 finding(s)
• Directives — 1 finding(s)
• Retention — 1 finding(s)
• Total: 249 finding(s)

Deep dive: homeboy audit data-machine --changed-since 286ac3c

Tooling versions

• Homeboy CLI: homeboy 0.182.0+dc8adf20
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: dd47f26a
• Action: unknown@unknown