Log the origin of a request that causes a transfer cache addition.

[jtorin]

Summary

With this change it's possible to differentiate between entries added because of configuration and those from runtime requests, the latter being candidates for the former.

From config:

Initializing cache with request: StreetRelevantOptions{transferMode: WALK, walk: WalkPreferences{speed: 0.69, boardCost: $0}, street: StreetPreferences{accessEgress: AccessEgressPreferences{maxDuration: DurationForStreetMode{default:50m, WALK:48m10s}}, maxDirectDuration: DurationForStreetMode{default:1h1m40s, CAR:1d}}}

From runtime:

Adding runtime request to cache: StreetRelevantOptions{transferMode: WALK, street: StreetPreferences{accessEgress: AccessEgressPreferences{maxDuration: DurationForStreetMode{default:50m}}, maxDirectDuration: DurationForStreetMode{default:1h1m40s, CAR:1d}}}

Issue

This makes it much easier to find and handle new transfer cache additions in the logs.

Testing

Manually tested for both cases.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.38%. Comparing base (39a7270) to head (e9b1e93).
Report is 2 commits behind head on dev-2.x.

Additional details and impacted files

@@            Coverage Diff             @@
##             dev-2.x    #5874   +/-   ##
==========================================
  Coverage      68.37%   68.38%           
- Complexity     16680    16683    +3     
==========================================
  Files           1914     1914           
  Lines          72658    72664    +6     
  Branches        7453     7453           
==========================================
+ Hits           49683    49691    +8     
+ Misses         20418    20416    -2     
  Partials        2557     2557           

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