ART-1434: shst matching robustness improvements

[edmabon]

Ticket

I was seeing some failed matches, even when I'd expect a good match just from looking at the trace, and by running OSRM matching directly. There were quite strict constraints on post-processing the OSRM output, and so I have loosened those off a little bit to give us more robustness in the output.

I will comment on the specific individual changes.

For testing, you can use this trace and run the matching on this branch vs the main branch to see the difference:

docker run -it --rm -v ${PWD}:/work --env SHST_TILE_URL=https://rr-binaries.s3.eu-west-2.amazonaws.com/tiles/ shst-image match /work/test.geojson --tile-source=osm/planet-240104 --search-radius=25 --follow-line-direction

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [
            -0.2094627999999993,
            52.5977402
          ],
          [
            -0.20944320000000027,
            52.59764479999999
          ],
          [
            -0.20948560000000072,
            52.598114
          ],
          [
            -0.21030939999999987,
            52.598419199999995
          ],
          [
            -0.21161750000000076,
            52.59839629999999
          ],
          [
            -0.22327850000000107,
            52.6007805
          ],
          [
            -0.22510950000000032,
            52.60230259999999
          ],
          [
            -0.22987429999999948,
            52.60523220000001
          ],
          [
            -0.23804459999999988,
            52.60895539999999
          ],
          [
            -0.24569849999999904,
            52.61297230000001
          ],
          [
            -0.24825579999999914,
            52.614566800000006
          ],
          [
            -0.24752409999999983,
            52.614574399999995
          ],
          [
            -0.24688100000000002,
            52.61516189999999
          ],
          [
            -0.24682960000000137,
            52.6155472
          ],
          [
            -0.24776610000000016,
            52.6158524
          ],
          [
            -0.24778540000000043,
            52.61575319999999
          ]
        ]
      }
    }
  ]
}

[mandu]

Thanks @edmabon for clear comments!