* add svensson yield curve, cleanup fomc documents endpoint, make provider a standalone extension, move apps from platform-api into extension, and update some models to add prefix/suffix in widget definitions
* black
* do what codeQL says
* black again
* use get_args instead of Literal.__args__
* linting
* test items
* grammar police
* test functions need to start with test_*
* test params
* add total factor productivity from sf fed
* openpyxl required for Excel file handling
* grammar police
* inflation expectations
* Update pr-description check action to properly handle quotes
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Co-authored-by: deeleeramone <>
Co-authored-by: Theodore Aptekarev <aptekarev@gmail.com>