Configure DMC promotion apply command for Homeboy

[chubes4]

Problem

The wp-coding-agents Homeboy integration owns the persisted worktree_providers.dmc configuration. It currently emits resolve, list, cleanup_preview, and cleanup_apply, but no commands.apply, so Homeboy cannot discover the typed DMC promotion adapter being added in Extra-Chill/data-machine-code#946.

Expected

• Add the stable DMC invocation to homeboy_dmc_command_json, using the explicit {handle} argument and site --path flag.
• Include it as commands.apply in the provider JSON installed by setup/upgrade.
• Extend tests/homeboy-dmc-provider.sh to assert exact argv ordering and preserved existing provider fields.
• Keep the integration generic from Homeboy core’s perspective; wp-coding-agents owns the WordPress/DMC command wiring.

End-to-end proof

With Extra-Chill/homeboy#9719, the stacked #7898 Homeboy candidate, and Extra-Chill/data-machine-code#946 available, a normal homeboy agent-task cook --to-worktree <dmc-handle> must resolve and invoke DMC promotion without per-run --provider-command or --provider-argv.

References

• agent-task cook cannot promote into DMC-managed worktrees without an apply-capable provider command homeboy#7898
• Clarify promotion provider contracts and schema errors homeboy#9719
• Expose typed Homeboy promotion apply adapter for managed worktrees data-machine-code#945
• Add typed Homeboy promotion adapter data-machine-code#946

AI assistance

• AI assistance: Yes
• Tool: OpenCode
• Model: OpenAI GPT-5.6 Sol
• Used for: Verified ownership of the generated Homeboy provider configuration and drafted the integration tracker. Chris reviewed and owns the report.