<!-- Add the related story/sub-task/bug number, like Resolves#123, or
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**Related issue:** Resolves#38889
# Checklist for submitter
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
## Testing
- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Structured logging with selectable JSON/text output and optional trace
correlation (trace_id, span_id).
* Backward-compatible output (ts timestamp, lowercase levels) and
adapter to interoperate with existing logging calls.
* **Refactor**
* Simplified logger initialization and centralized slog-based logging
infrastructure.
* **Tests**
* Extensive tests and a test handler for logging behavior, formats,
levels, and trace injection.
* **Chores**
* Added package-level dependency check for the logging package.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
