Improve batch pathfinding performances

[flomonster]

Description

This PR tries to improve calls to simulation_summary when train schedules are not cached to redis.

• Fixing the --no-cache option
• Reducing the number of call perform to the database

Benchmark

• Run simulation_summary endpoint on 30 train schedules timetable (all valid)
• --no-cache option is enabled

Before

Time: 1.15s
Number of DB queries: 236

After

Time: 937ms
Number of DB queries: 5

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 215 lines in your changes missing coverage. Please review.

Project coverage is 28.06%. Comparing base (814e018) to head (b0214a2).

Files	Patch %	Lines
editoast/src/views/v2/path/path_item_cache.rs	0.00%	184 Missing ⚠️
editoast/src/views/v2/path/pathfinding.rs	0.00%	16 Missing ⚠️
editoast/src/views/v2/timetable/stdcm.rs	0.00%	9 Missing ⚠️
editoast/src/redis_utils.rs	0.00%	4 Missing ⚠️
...st/editoast_schemas/src/infra/operational_point.rs	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##                dev    #8035      +/-   ##
============================================
- Coverage     28.07%   28.06%   -0.01%     
  Complexity     2075     2075              
============================================
  Files          1288     1289       +1     
  Lines        157729   157764      +35     
  Branches       3121     3121              
============================================
- Hits          44283    44281       -2     
- Misses       111569   111606      +37     
  Partials       1877     1877              

Flag	Coverage Δ
core	75.03% <ø> (ø)
editoast	70.80% <0.00%> (-0.10%)	⬇️
front	9.94% <ø> (ø)
gateway	2.34% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	72.93% <ø> (ø)

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[Castavo]

Nice optimization !

(This patch has 0% coverage 👀)

[Castavo]

Neat

[woshilapin]

Mostly naming considerations. In general, this should help a lot to be more gentle on the DB, so nice work!