<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#37192
- Move /server/service/middleware/endpoint_utils to
/server/platform/endpointer
- Move /server/service/middleware/authzcheck to
/server/platform/middleware/authzcheck
- Move /server/service/middleware/ratelimit to
/server/platform/middleware/ratelimit
# 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
## Release Notes
* **Refactor**
* Reorganized internal endpoint utilities to a centralized platform
location for improved code organization and maintainability. No
functional changes to existing features or APIs.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Resolves#37192
Separating generic endpoint_utils middleware logic from domain-specific
business logic. New bounded contexts would share the generic logic and
implement their own domain-specific logic. The two approaches used in
this PR are:
- Use common `platform` types
- Use interfaces
In the next PR we will move `endpointer_utils`, `authzcheck` and
`ratelimit` into `platform` directory.
# Checklist for submitter
- [x] Added changes file
## Testing
- [x] Added/updated tests
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Refactor**
* Restructured internal error handling and context management to support
bounded context architecture.
* Improved error context collection and telemetry observability through
a provider-based mechanism.
* Decoupled licensing and authentication concerns into interfaces for
better modularity.
* **Chores**
* Updated internal package dependencies to align with new architectural
boundaries.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
