Improve ZaString safety, correctness, and performance#27

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CorentinGS wants to merge 15 commits intomainfrom

feature/zastring-final

Commits on Apr 24, 2026

Add .worktrees to .gitignore
CorentinGS
committed

Commits on Apr 25, 2026

API Consistency and Completeness fixes
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Fix AppendFormat allocation issue and add missing test coverage
CorentinGS
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Fix correctness issues: JSON U+2028/U+2029 escaping, CSV empty string quoting, TryAppendLine atomicity comment, ZaSpanString XML docs, ZaPooledStringBuilder validation
CorentinGS
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Add testing improvements: disposal safety, overflow atomicity, and assertion modernization
CorentinGS
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Fix build configuration: enable MinVer, conditional CI build, document netstandard2.1 exclusion
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Add disposal safety to ZaPooledStringBuilder
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Fix ZaPooledStringBuilder.Append infinite loop
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Add retry limit edge case tests
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Add demo examples and README updates
CorentinGS
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Apply suggestions from code review

CorentinGS
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Copilot
authored
Add builder mutation examples and overflow coverage
CorentinGS
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Fix builder mutation and query atomicity
CorentinGS
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Add interpolation alignment overloads and remove retry cap
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Harden review edge cases and tests
CorentinGS
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