services: resolve owner from the registered service file

[p-linnane]

Follow-up to #23750. FormulaWrapper#owner fell through to the boot-path presence check whenever the registered plist had no UserName, so a user whose own sh.brew.<formula> agent is registered under ~/Library/LaunchAgents was reported as root as soon as a legacy homebrew.mxcl.<formula> daemon also existed under /Library/LaunchDaemons. That wrong owner shows up in brew services list and info and in the root-skipping filter behind stop --all and restart --all.

The owner now follows the registered service file: in the boot path it is root, in the user path it is the current user, and only then does the presence-based fallback run. This also fixes a nil owner for package-provided plists whose label is not one of the formula's generated names, since the presence checks only look at those names. Linux and systemd behavior is unchanged.

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• I did not use AI/LLM to create this PR, or I disclosed the tool/model below and reviewed its output; I did not attribute commits to AI and will answer maintainer questions and review comments myself without AI/LLM.

Claude Code (Fable 5.1) drafted the implementation and tests; I reviewed the diff, verified the new tests fail without the change and pass with it, and ran brew lgtm.

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[Copilot]

🟢 Approval recommended

The ownership fix is covered by regression tests with no unresolved issues.

Pull request overview

Resolves macOS service ownership from the registered service file’s location before using legacy fallbacks.

Changes:

• Maps boot-path services to root and user-path services to the current user.
• Adds regression tests for conflicting registrations.

File summaries

File	Description
Library/Homebrew/test/services/formula_wrapper_spec.rb	Tests user and root ownership precedence.
Library/Homebrew/services/formula_wrapper.rb	Resolves ownership from the registered service path.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Balanced

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[MikeMcQuaid]

Thanks!