Add PERCENTILE and QUARTILE function families#1650

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marcin-kordas-hoc wants to merge 10 commits intodevelopfrom

feature/percentile-quartile

Commits on Mar 20, 2026

Add PERCENTILE, PERCENTILE.INC, PERCENTILE.EXC, QUARTILE, QUARTILE.INC, QUARTILE.EXC functions

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Commits on Mar 23, 2026

refactor: simplify PercentilePlugin — extract helper, fix quartile validation

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Commits on Apr 7, 2026

fix: i18n translations, plugin export order, metadata resolution

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fix(i18n): revert ruRU PERCENTILE.INC/EXC to ПРОЦЕНТИЛЬ (official MS name)

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fix(i18n): revert csCZ and trTR to original values (confirmed via MS docs)

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refactor: improve JSDoc, naming, and inline comments in PercentilePlugin

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fix: remove private ClickUp links from public CHANGELOG entry
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fix: add PR link to CHANGELOG entry
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refactor: use FunctionPlugin.aliases for PERCENTILE/QUARTILE (sequba review)

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Commits on Apr 8, 2026

refactor: split percentileExclusive error messages for better explainability
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