[configlet] tree-building: missing test cases

[github-actions]

Missing test cases for tree-building

Part of #2959.

The following test cases from problem-specifications are not yet implemented in this track:

• 761790a3-4c27-461a-b4e9-8bce8ccee5a1 empty list
• dcc89dc3-eb39-4f26-a3cd-964e607c95ff single record
• dcdb80f0-e5da-43e1-8b8d-6f307be89c0e three records in order
• 2ff5b8f8-d95e-401e-9359-233919488d22 three records in reverse order
• de798d3b-8905-4446-a114-a0dd2476d945 more than two children
• 13dd9b3c-6137-415f-b6fe-5044c1dfbc50 binary tree
• 5cfd29dc-166b-47da-84ca-1c60b5ae5941 unbalanced tree
• a05ddb5d-2d11-4948-88d3-b5f18a44ddce one root node and has parent
• 9ed09df2-8fd6-4e37-aa37-e7753c057a1a root node has parent
• 8755a2c4-2c6b-4396-b155-b5bf4b6bc280 no root node
• c6ef8f9a-4045-4949-a1e1-e0ae804e4af4 duplicate node
• 7a7b77a6-3447-4905-b79c-d22bfe43f408 duplicate root
• c6f51bd7-3608-4390-b446-dfd1bcbf3ddc non-continuous
• 1f3d1b50-4494-4b22-b88a-68f32f7d321d cycle directly
• ac568b50-3f9b-4cb4-b602-e0eb13de4269 cycle indirectly
• cf954b21-3cef-420c-8e72-d19547505e1f higher id parent of lower id

How to help

For detailed instructions on how to fetch configlet and update the tests, please see the "How to do this task" section in the main tracking issue:
👉 Read the instructions here

This issue is managed automatically by the Create Configlet Sync Issues workflow.