unstructured

264d569b - feat: render Formula elements as $$ blocks with optional normalization (#4308)

feat: render Formula elements as $$ blocks with optional normalization (#4308) ## Summary - Render `Formula` elements as Markdown math blocks (`$$ ... $$`) during markdown staging export. - Add optional `normalize_formula` flag (default `True`) to control conservative Unicode-math to LaTeX-like normalization. - Add tests for: - formula block rendering - normalization on/off behavior - passthrough of `normalize_formula` via `create_file_from_elements()` - Update changelog and bump package version to `0.22.11`. Closes #3868