Move edge-validator into its own namespace

schemas/edge-validator/error-report/error-report.1.parquetmr.txt

@@ -2,7 +2,7 @@ message edge-validator {
     required group results {
         required int32 error_count;
         required float32 error_rate;
-        opetional group errors (MAP) {
+        optional group errors (MAP) {
             repeated group key_value {
                 required binary key (UTF8);
                 required int32 value;

templates/edge-validator/error-report/error-report.1.parquetmr.txt

@@ -2,7 +2,7 @@ message edge-validator {
     required group results {
         required int32 error_count;
         required float32 error_rate;
-        opetional group errors (MAP) {
+        optional group errors (MAP) {
             repeated group key_value {
                 required binary key (UTF8);
                 required int32 value;