Recognize preserved CRLF in frozen JSON whitespace checks

.gitattributes

@@ -8,6 +8,6 @@ tools/embeddinggemma2/*.patch -whitespace
 fixtures/mixed/sources/** -text
 
 # Frozen diagnostic manifests/labels retain the exact bytes used in recorded runs.
-fixtures/music-validation-v1/*.json -text
-tools/rerank-eval/*-plan.json -text
-tools/rerank-eval/*-manifest.json -text
+fixtures/music-validation-v1/*.json -text whitespace=blank-at-eol,blank-at-eof,space-before-tab,cr-at-eol
+tools/rerank-eval/*-plan.json -text whitespace=blank-at-eol,blank-at-eof,space-before-tab,cr-at-eol
+tools/rerank-eval/*-manifest.json -text whitespace=blank-at-eol,blank-at-eof,space-before-tab,cr-at-eol