ST_Pixelize small polygon error

## Expected behavior
ST_Pixelize returns 0 pixels

## Actual behavior
ST_Pixelize throw assertion:

Caused by: java.lang.AssertionError: assertion failed
at scala.Predef$.assert(Predef.scala:208)
at org.apache.spark.sql.sedona_viz.expressions.ST_Pixelize.eval(Pixelize.scala:119)
at org.apache.spark.sql.catalyst.expressions.Alias.eval(namedExpressions.scala:160)

## Steps to reproduce the problem
case class A(g : String)
val a0 = "3.1" // change a0,a1 to values so an integer point lies between them
val a1 = "3.8"
val d = Seq( A(s"POLYGON (($a0 $a0, $a1 $a0, $a1 $a1, $a0 $a1, $a0 $a0))"))
import spark.implicits._
val df = d.toDS().toDF() .withColumn("geo", expr("ST_GeomFromWKT(g)")) .withColumn("area", expr("ST_Area(geo)"))
df.select("geo", "area").show(false)

val df2 = df .withColumn("px", expr("ST_Pixelize(geo, 10,10, ST_PolygonFromEnvelope(0,0,10,10))")) .show(false)
## Settings

Sedona version = 1.5.0
Apache Spark version = 3.3.0
Apache Flink version = ?
API type = Scala
Scala version = 2.12
JRE version = 1.8
Python version = not tested
Environment = Databricks?

Reproduce the Scala example with ST_Pixelize and inspect Pixelize.scala at line 119, where the assertion is reported. Check the small-polygon case whose coordinates lie within the 0–10 envelope, then verify that the expression returns 0 pixels without throwing an assertion error.

Written by the indexing model from the issue text.