Intent of modelSelection.ts ×2

All 3 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/ 3 tests
- workbench/ 3 tests
  - contrib/ 3 tests
    
    chat/ 3 tests
    
    test/ 3 tests
    
    common/ 3 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/contrib/chat/test/common/modelSelection.test|title=ModelSelection falls back when a configured model is inapplicable to an authoritative provider pool|occurrence=1 Inherited modelSelection.test|title=ModelSelection falls back when a configured model is inapplicable to an authoritative provider pool|occurrence=1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/contrib/chat/test/common/modelSelection.test|title=ModelSelection resets on scope change, clears empty pools, and re-pushes reused chats|occurrence=1 Inherited modelSelection.ts ×2
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/contrib/chat/test/common/modelSelection.test|title=ModelSelection uses the same new-conversation policy for configured, remembered, pending, and fallback models|occurrence=1 Inherited modelSelection.ts ×1