Specific Small buffer of a polygon returns an empty geometry

Dear Dr JTS,

In our codebase we use erode and dilate buffers (of 0.01) to clean up polygons and multi-polygons.

Recently we have updated our version of JTS and came across the same issues as described in [https://github.com/locationtech/jts/issues/908] Issue 908.

I did some testing on small buffers that previously worked but that are now failing. See the simple code below:

`
GeometryFactory sourceFactory = new GeometryFactory(new PrecisionModel(1000d));

    LinearRing linearRing = sourceFactory.createLinearRing(new Coordinate[] { //
            new Coordinate(238.726, 732.955), //
            new Coordinate(229.698, 728.655), //
            new Coordinate(215.57, 758.315), //
            new Coordinate(224.598, 762.615), //
            new Coordinate(238.726, 732.955) });

    Polygon polygon = sourceFactory.createPolygon(linearRing);

    BufferOp bufferOp = new BufferOp(polygon, new BufferParameters());

    Geometry bufferedGeometry = bufferOp.getResultGeometry(-0.009);
    assertFalse(bufferedGeometry.isEmpty()); // Succeeds

    bufferedGeometry = bufferOp.getResultGeometry(-0.011);
    assertFalse(bufferedGeometry.isEmpty()); // Succeeds

    bufferedGeometry = bufferOp.getResultGeometry(-0.01);
    assertFalse(bufferedGeometry.isEmpty()); // Fails

    bufferedGeometry = new BufferOp(bufferOp.getResultGeometry(-0.009), new BufferParameters()).getResultGeometry(-0.001);
    assertFalse(bufferedGeometry.isEmpty()); // Also Fails

    bufferedGeometry = new BufferOp(bufferOp.getResultGeometry(-0.011), new BufferParameters()).getResultGeometry(0.001);
    assertFalse(bufferedGeometry.isEmpty()); // Succeeds

`

I wonder why it fails specifically on the 0.01 buffer and whether this is an issue in the heuristics.

Start by running the Java reproduction using GeometryFactory, BufferOp, and BufferParameters, focusing on the -0.01 buffer and the two composed buffers. Trace the buffer result and its heuristic behavior, then add a regression test showing that these cases preserve the expected non-empty geometry.