Exaggerate safest street routing

[miklcct]

Summary

This adjusts the safest street routing to exaggerate the use of safest streets.

This is based on #6782 as the correct heuristics depends on if the normalizer is removed.

Issue

None yet.

The problem here is that, in the original code, safest street has a negligible difference to safe street routing, unless elevation is involved. The original exaggeration code to exaggerate safety factor of < 0.1 does not really happen in practice, as most safe streets (greenways) are around 0.3 to 0.6, and it never happens before the normalizer was removed.

Therefore, I am adjusting it so the safety values used for safest street routing is the original safety squared times 2, and extracted to a helper method. The effect is that, neutral streets will be avoided, dangerous streets will be avoided at all costs, slightly safe streets (about 0.7) will appear neutral, and very safe streets will be safe.

Unit tests

Added

Documentation

N/A

Changelog

N/A

Bumping the serialization version id

N/A

[codecov]

Codecov Report

❌ Patch coverage is 80.59701% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.19%. Comparing base (ca8971f) to head (5b89e9a).

Files with missing lines	Patch %	Lines
...r/graph_builder/module/osm/SafetyValueApplier.java	72.72%	9 Missing and 6 partials ⚠️
...ch/strategy/EuclideanRemainingWeightHeuristic.java	78.00%	9 Missing and 2 partials ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             dev-2.x    #6785      +/-   ##
=============================================
- Coverage      72.20%   72.19%   -0.01%     
- Complexity     20134    20143       +9     
=============================================
  Files           2183     2184       +1     
  Lines          81108    81133      +25     
  Branches        8144     8136       -8     
=============================================
+ Hits           58561    58574      +13     
- Misses         19666    19679      +13     
+ Partials        2881     2880       -1     

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