Add the hot reload delta emitter and symbol matcher#20027

Draft

NatElkins wants to merge 16 commits into

dotnet:mainfrom

NatElkins:hotreload-delta-emitter

Commits on Jul 3, 2026

Merge remote-tracking branch 'upstream/hotreload-stable-names' into hotreload-baseline-reader
NatElkins
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Add hot reload baseline reader state
NatElkins
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Merge remote-tracking branch 'upstream/hotreload-typedtree-diff' into hotreload-delta-emitter
NatElkins
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Merge remote-tracking branch 'upstream/enc-metadata-delta-writer' into hotreload-delta-emitter
NatElkins
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Extract hot reload delta emitter
NatElkins
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Fix EnC CDI cross-validation test process launch on Desktop and bare CI images
NatElkins
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Fix synthesized-name snapshot assertions to use the array equality overload
NatElkins
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Merge branch 'pdb-method-cdi-emission' into hotreload-baseline-reader
NatElkins
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Merge branch 'hotreload-baseline-reader' into hotreload-delta-emitter
NatElkins
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Align the signature-change diff test with the evolved differ classification
NatElkins
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