<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#36670
Refactoring `middleware/endpoint_utils` package to remove direct
dependencies on:
- fleet.Service
- android.Service
Specific changes are:
- replace AuthFunc+FleetService with AuthMiddleware
- Move the definition of handler functions to the respective services
and use a generic `CommonEndpointer[H any] struct`
Although this was discovered as part of Activity bounded context
research, this change is not directly related to bounded contexts.
In retrospect, this decoupling should have been done when creating the
Android service for ADR-0001.
## Testing
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Refactor**
* Internal restructuring of endpoint handling and authentication
middleware composition to improve code maintainability and type safety.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Victor Lyuboslavsky
cdd57fc206