Add feature-engineered data dictionary, statistics, and correlation workbook

.gitattributes

@@ -58,3 +58,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 # Video files - compressed
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.webm filter=lfs diff=lfs merge=lfs -text
+data_dictionary/feature_engineering_data_dictionary.xlsx filter=lfs diff=lfs merge=lfs -text

data_dictionary/feature_engineering_data_dictionary.xlsx

@@ -0,0 +1,3 @@
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