MINIFICPP-2857 Processors w/o relationships have incomplete manifest …

[martinzink]

…entries

Luckily this only affected test processors but we should fix it nonetheless.

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[Copilot]

Pull request overview

Fixes component manifest serialization so processors that define no relationships still emit the processor-only manifest attributes (e.g., inputRequirement, isSingleThreaded, and an empty supportedRelationships array). This addresses incomplete manifest entries that were primarily impacting test processors.

Changes:

• Extend serializeClassDescription with an explicit flag to include processor-only attributes, rather than keying off whether relationships are present.
• Ensure processor manifests always include inputRequirement, isSingleThreaded, and supportedRelationships (even when empty), while controller services do not.
• Update the Ubuntu 22.04 clang ARM reference manifest to reflect the corrected output.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
libminifi/src/core/state/nodes/AgentInformation.cpp	Makes processor-only manifest fields unconditional for processors by adding an explicit include_processor_only_attributes switch.
.github/references/ubuntu_22_04_clang_arm_manifest.json	Updates the golden/reference manifest to include the now-present processor-only fields for processors that previously omitted them.

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