Add test framework and coverage for multi-status filtering (#68/#69)

[devondragon]

Background

PR #69 added multi-status filtering and includeAllStatuses support to the motion_tasks list operation. The new behavior currently has no test coverage because no test framework exists in the codebase.

What needs testing

Once a test framework is set up, the following scenarios should be covered:

• status as array serializes to repeated status= query params in getTasks()
• includeAllStatuses: true appends includeAllStatuses=true to query params
• Combining status (non-empty) and includeAllStatuses returns a validation error
• status: [] (empty array) + includeAllStatuses: true does not error (empty array = no filter)
• status array with empty string elements is rejected with validation error
• Single status string still works (backward compatibility)
• status array rejected with clear error message for create and update operations

Related

• Issue motion_tasks list operation doesn't support multi-status filtering or includeAllStatuses #68
• PR feat: support multi-status filtering and includeAllStatuses for task listing #69