Add mission import and export tests

[1Blademaster]

No description provided.

[Copilot]

Pull Request Overview

This PR adds comprehensive test coverage for mission import and export functionality. The changes include tests for importing missions from files, exporting missions to files, and error handling scenarios for both operations.

• Adds new test fixtures for cleanup of exported files
• Implements import tests for mission, fence, and rally types with success and error scenarios
• Implements export tests for mission, fence, and rally types with file validation
• Updates existing upload tests to verify roundtrip read-back functionality

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
radio/tests/test_mission.py	Adds comprehensive test coverage for mission import/export operations and updates existing upload tests
radio/tests/mission_test_files/test_importMissionFromFile_*_result.json	Test data files containing expected results for import operations
radio/tests/mission_test_files/exported_*_check.txt	Reference files for validating export operations
radio/app/endpoints/mission.py	Updates import message handling to use dynamic message from result
radio/app/controllers/missionController.py	Improves error messages by using mission name instead of type number

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[NexInfinite]

LGTM