feat(lane_change): output velocity factor

[satoshi-ota]

Description

Outputs velocity factor when this module modifies path velocity.

Related links

Parent Issue:

• feat(bpp): add velocity interface #9344

How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 29.78%. Comparing base (a0c4ab4) to head (0339dd0).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
...behavior_path_lane_change_module/src/interface.cpp	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9349      +/-   ##
==========================================
- Coverage   29.79%   29.78%   -0.01%     
==========================================
  Files        1338     1340       +2     
  Lines      103211   103262      +51     
  Branches    40212    40219       +7     
==========================================
+ Hits        30748    30755       +7     
- Misses      69477    69519      +42     
- Partials     2986     2988       +2     

Flag	Coverage Δ		*Carryforward flag
differential	20.03% <0.00%> (?)
total	29.79% <ø> (-0.01%)	⬇️	Carriedforward from 5dcb52b

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