use new number type to be compatible with dynamo

dynamodb/expression.odin

@@ -60,8 +60,9 @@ key_condition_get_pk_bytes :: proc(kc: ^Key_Condition) -> ([]byte, bool) {
 	#partial switch v in kc.pk_value {
 	case String:
 		return transmute([]byte)string(v), true
-	case Number:
-		return transmute([]byte)string(v), true
+	case DDB_Number:
+		// Use canonical encoding for numbers in keys!
+		return encode_ddb_number_for_sort(v), true
 	case Binary:
 		return transmute([]byte)string(v), true
 	}