MINIFICPP-2708 Controller Service C API

[martinzink]

Built upon ongoing #2065 #2098 and #2105 PR-s

---

Thank you for submitting a contribution to Apache NiFi - MiNiFi C++.

In order to streamline the review of the contribution we ask you
to ensure the following steps have been taken:

For all changes:

• Is there a JIRA ticket associated with this PR? Is it referenced
  in the commit message?

• Does your PR title start with MINIFICPP-XXXX where XXXX is the JIRA number you are trying to resolve? Pay particular attention to the hyphen "-" character.

• Has your PR been rebased against the latest commit within the target branch (typically main)?

• Is your initial contribution a single, squashed commit?

For code changes:

• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE file?
• If applicable, have you updated the NOTICE file?

For documentation related changes:

• Have you ensured that format looks appropriate for the output in which it is rendered?

Note:

Please ensure that once the PR is submitted, you check GitHub Actions CI results for build issues and submit an update to your PR as soon as possible.

[Copilot]

Pull request overview

This pull request implements a C API for Controller Services, extending the existing C API infrastructure (which previously only supported Processors) to include Controller Services. This aligns with the JIRA ticket MINIFICPP-2708 and allows Controller Services to be defined and used through the C interface.

Changes:

• Renamed ControllerServiceApi/ControllerServiceApiDefinition types to ControllerServiceType/ControllerServiceTypeDefinition for better clarity
• Moved ControllerServiceMetadata from core::controller namespace to core namespace for consistency
• Added C API structures and functions for Controller Service definition, creation, and property access

Reviewed changes

Copilot reviewed 31 out of 31 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
minifi-api/include/minifi-c/minifi-c.h	Adds C API structures for controller services including MinifiControllerServiceContext, MinifiControllerServiceMetadata, MinifiControllerServiceCallbacks, and MinifiControllerServiceClassDefinition
libminifi/include/utils/CControllerService.h	New C++ wrapper class for controller services created through C API
libminifi/src/minifi-c.cpp	Implements C API functions for controller service operations including property access and service retrieval
minifi-api/include/minifi-cpp/core/ControllerServiceType.h	Renames ControllerServiceApi to ControllerServiceType for clarity
minifi-api/include/minifi-cpp/core/ControllerServiceTypeDefinition.h	Renames ControllerServiceApiDefinition to ControllerServiceTypeDefinition
minifi-api/common/include/minifi-cpp/core/ControllerServiceMetadata.h	Moves from controller namespace to core namespace
minifi-api/include/minifi-cpp/core/controller/ControllerServiceDescriptor.h	Adds overload for setSupportedProperties accepting Property span
libminifi/include/core/controller/ControllerService.h	Updates to use renamed types and implements new setSupportedProperties overload
extensions/*/*.cpp	Updates extension loaders to include new controller_services_count and controller_services_ptr fields
Extensions.md	Documents the new controller service fields in MinifiExtensionCreateInfo

Comments suppressed due to low confidence (1)

minifi-api/common/include/minifi-cpp/core/ControllerServiceMetadata.h:2

• Inconsistent comment formatting: the asterisk on line 2 is not aligned with the others. It should be aligned with line 3's asterisk for consistency.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[martinzink]

I think its better to also target #2105 I'll convert to draft while I sort out the PR dependencies.