Document SNR column in Croissant metadata

Adds snr_db fields to the Croissant record sets for all and all-review-sample.

croissant_rai_OpenWhistle-Classification-Finetuning.json

@@ -71,7 +71,7 @@
     "url": "https://huggingface.co/OpenWhistleNeurIPS26"
   },
   "datePublished": "2026-04-20",
-  "dateModified": "2026-04-27",
+  "dateModified": "2026-05-05",
   "license": "https://creativecommons.org/licenses/by/4.0/",
   "version": "1.0.0",
   "identifier": "https://huggingface.co/datasets/OpenWhistleNeurIPS26/OpenWhistle-Classification-Finetuning",
@@ -420,6 +420,20 @@
               "jsonPath": "bytes"
             }
           }
+        },
+        {
+          "@type": "cr:Field",
+          "@id": "all/snr_db",
+          "dataType": "cr:Float64",
+          "description": "Estimated clip-level signal-to-noise ratio in dB.",
+          "source": {
+            "fileSet": {
+              "@id": "parquet-files-for-config-all"
+            },
+            "extract": {
+              "column": "snr_db"
+            }
+          }
         }
       ]
     },
@@ -682,6 +696,20 @@
               "jsonPath": "bytes"
             }
           }
+        },
+        {
+          "@type": "cr:Field",
+          "@id": "all-review-sample/snr_db",
+          "dataType": "cr:Float64",
+          "description": "Estimated clip-level signal-to-noise ratio in dB.",
+          "source": {
+            "fileSet": {
+              "@id": "parquet-files-for-config-all-review-sample"
+            },
+            "extract": {
+              "column": "snr_db"
+            }
+          }
         }
       ]
     },
@@ -1851,4 +1879,4 @@
       ]
     }
   ]
-}
+}