fix(deps): update dependency fastapi to v0.115.6 (#4677) #1594

Job	Run time
Frontend and End-to-End Tests / lint	2m 28s
Frontend and End-to-End Tests / build	2m 21s
Backend Server Tests / tests (sqlite)	9m 52s
Backend Server Tests / tests (postgres)	10m 37s
Build Tagged Release / publish	1m 9s
Notify Discord	9s
	26m 36s

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