Handle returned zerolog events without false positives

[Codex]

False positives were reported when functions returned *zerolog.Event without dispatching it themselves (e.g., return log.Info()).

• Analyzer: Skip tracking zerolog events whose SSA value flows into a return, preventing dispatch warnings for returned events.
• Tests: Added regression cases covering direct and named-return of *zerolog.Event.

Example:

func info() *zerolog.Event {
	return log.Info() // no dispatch warning
}

Original prompt

---

This section details on the original issue you should resolve

<issue_title>False positive when returned by function</issue_title>
<issue_description>Is this false positive?

func info() *zerolog.Event {
	return log.Info()
}

must be dispatched by Msg or Send method (zerologlint)
	return log.Info()

</issue_description>

Comments on the Issue (you are @codex[agent] in this section)

@ykadowak Can you provide a complete example? Like a link to the line in a repository. @ykadowak Thank you. I confirmed. It might take some time to fix this to be honest though.

• Fixes False positive when returned by function #15