Analyzer flagging problematic APIs in ThreadSafeTask#12143

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JanProvaznik wants to merge 13 commits intodotnet:mainfrom

JanProvaznik:threadsafe-analyzer

Commits on Feb 11, 2026

Implement thread-safe task analyzer with transitive call graph analysis
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Commits on Feb 20, 2026

Fire all rules (0001-0005) on all ITask implementations

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Expand file-path types to cover XML, compression, diagnostics, resources

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Add editorconfig option to control analyzer scope

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Fix IL overload resolution for file-path types, add multi-assembly tests

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Fix IL overload resolution, add source→external chain test

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Remove stale violation scan output files

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Fix deep chain analysis: ConcurrentBag snapshot + IL overload disambiguation

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