core: update start of free block in signal projection (space-time chart) when stopping on closed signal #15028

Job	Run time
Check generated railjson sync	23s
Check scripts	5s
Check railjson generator	1m 55s
Build (core-build, core)	22s
Build (editoast, editoast-test)	23s
Check commits	8s
Build (gateway-test, gateway-standalone, gateway-front)	2m 41s
Build (front-build, front-tests, front-devel, front-nginx)	2m 46s
Build (osrdyne, osrdyne-test)	18s
Check dockerfiles	8s
Check integration tests	1m 31s
Check final newline	8s
Check osrd schema	39s
Check reuse compliance	12s
Check toml	5s
Check infra schema sync	16s
Check core	4m 10s
Check editoast tests	6m 31s
Check front rtk sync	1m 39s
Check editoast lints	9m 55s
Check editoast openapi	1m 19s
Check front	2m 44s
Check gateway	3m 26s
Check osrdyne	3m 51s
Integration tests	1m 15s
End to end tests	13m 44s
	1h 0m 34s

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