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feat(ffi): plumb `simplify`, `expressions`, `reverse_expr`, and `documentation` through `FFI_WindowUDF` #70210

Job	Run time
Check Markdown Links	18s
Use prettier to check formatting of documents	34s
Spell Check with Typos	1m 21s
Check License Header	1m 20s
Validate required_status_checks in .asf.yaml	10s
	3m 43s

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