fix: handle null values in method to Interval64Binding, IntervalBinding, TimestampBinding, and YsonBinding

Author: Daza10samu

jooq-dialect/src/main/java/tech/ydb/jooq/binding/Interval64Binding.java

@@ -49,7 +49,7 @@ public Duration from(ULong databaseObject) {
 
         @Override
         public ULong to(Duration userObject) {
-            return ULong.valueOf(TimeUnit.NANOSECONDS.toMicros(userObject.toNanos()));
+            return userObject == null ? null : ULong.valueOf(TimeUnit.NANOSECONDS.toMicros(userObject.toNanos()));
         }
 
         @Override

jooq-dialect/src/main/java/tech/ydb/jooq/binding/IntervalBinding.java

@@ -44,7 +44,7 @@ public Duration from(YearToSecond databaseObject) {
 
         @Override
         public YearToSecond to(Duration userObject) {
-            return YearToSecond.valueOf(userObject);
+            return userObject == null ? null : YearToSecond.valueOf(userObject);
         }
 
         @Override

jooq-dialect/src/main/java/tech/ydb/jooq/binding/TimestampBinding.java

@@ -44,7 +44,7 @@ public Instant from(LocalDateTime databaseObject) {
 
         @Override
         public LocalDateTime to(Instant userObject) {
-            return LocalDateTime.ofInstant(userObject, ZoneOffset.UTC);
+            return userObject == null ? null : LocalDateTime.ofInstant(userObject, ZoneOffset.UTC);
         }
 
         @Override