C#: Narrow scaffolding to (transitive) dependencies.#20763

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michaelnebel wants to merge 18 commits intogithub:mainfrom

michaelnebel:csharp/overlaynarrowscaffold

Commits on Nov 4, 2025

C#: Enable overlay compilation in lib/qlpack.yml.
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C#: Fix bad join due to overlay compilation.
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C#: Add overlay builtins to the dbscheme.
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C#: Add upgrade- and downgrade scripts.
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C#: Turn on overlay support in codeql-extractor.yml.
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C#: Add functionality to detect overlay mode and integrate in extraction context.
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C#: Add unit test.
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C#: Sprinkle uses of OnlyScaffold to extract less when in overlay mode.
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C#: Write overlay metadata at end of extraction.
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C#: Define discarding predicates for expressions, statements, locations and some named TRAP entities.
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C#: Add QL overlay tests.
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C#: Add a locatable type to the dbscheme.
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C#: Simplify the discarding and also discard type mentions and comments.
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C#: Add discarding for diagnostics and extractor messages.
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C#: Add change-note.
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C#: Only scaffold assemblies in overlay mode, only extract expressions when not scaffolding and only extract attributes when they are in source code in overlay mode.
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C#: Add using directives and type mentions as star entities.
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Commits on Nov 5, 2025

C#: Narrow scaffolding to transtive dependencies of the changed files.
michaelnebel
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