feat!: make session an arc-like object #8164

Job	Run time
Lints and doc tests on ubuntu-latest	1m 6s
Unit tests on ubuntu-latest	18m 54s
Typos Check	3s
Lints and doc tests on windows-latest	3m 48s
Unit tests on windows-latest	27m 4s
Lints and doc tests on macos-13	3m 28s
Unit tests on macos-13	17m 9s
Lints and doc tests on macos-14	1m 11s
Unit tests on macos-14	10m 33s
Memory leak checks	0s
CI status checks	1s
	1h 23m 17s

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