fix(gateway): correct fault filtering for entities and complete type_info response

[bburda]

Pull Request

Summary

• Fix Component fault listing to filter by hosted App FQNs instead of namespace path (too broad)
• Fix Function fault listing to aggregate faults from host apps using their FQNs
• Fix Area entity info to use actual namespace_path for fault filtering instead of empty string
• Fix data endpoints to return complete type_info object with both 'schema' and 'default_value' fields
• Refactor NativeTopicSampler to use future.wait_for() instead of custom spin loop

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Issue

Link the related issue (required):

• closes [BUG] Issues with fault filtering and missing type schema #151

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Type

• Bug fix
• New feature or tests
• Breaking change
• Documentation only

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Testing

How was this tested / how should reviewers verify it?

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Checklist

• Breaking changes are clearly described (and announced in docs / changelog if needed)
• Tests were added or updated if needed
• Docs were updated if behavior or public API changed

[Copilot]

Pull request overview

This PR fixes issues with fault filtering for different entity types and completes the type_info response structure in data endpoints.

Changes:

• Fixed fault filtering for Components to use hosted App FQNs instead of overly-broad namespace filtering
• Fixed fault filtering for Functions to aggregate faults from host Apps using their FQNs
• Fixed Area entity info to properly use namespace_path for fault filtering instead of empty string
• Fixed data endpoints to return complete type_info object with both 'schema' and 'default_value' fields
• Refactored NativeTopicSampler to use future.wait_for() instead of custom spin loop (cleaner implementation)

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
src/ros2_medkit_gateway/src/native_topic_sampler.cpp	Refactored from custom spin loop to idiomatic future.wait_for() for message waiting
src/ros2_medkit_gateway/src/http/handlers/handler_context.cpp	Fixed Area entity info to use actual namespace_path instead of empty string for fault filtering
src/ros2_medkit_gateway/src/http/handlers/fault_handlers.cpp	Implemented FQN-based fault filtering for Components and Functions, replacing overly-broad namespace filtering
src/ros2_medkit_gateway/src/http/handlers/data_handlers.cpp	Fixed type_info to return complete object with both 'schema' and 'default_value' fields