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fix: preserve legacy path bytes and repair tag, tree and ref edge cases #3094

Job	Run time
install/import (ubuntu-latest, 3.9)	17s
install/import (windows-latest, 3.9)	1m 5s
install/import (macos-latest, 3.8)	1m 3s
test (ubuntu, 3.13)	3m 45s
install/import (macos-latest, 3.9)	26s
install/import (windows-latest, 3.10)	1m 3s
install/import (macos-latest, 3.10)	45s
install/import (windows-latest, 3.8)	1m 3s
install/import (ubuntu-latest, 3.8)	13s
install/import (ubuntu-latest, 3.10)	9s
test (ubuntu, 3.12)	5m 1s
test (macos, 3.11)	9m 41s
test (ubuntu, 3.15)	4m 41s
test (ubuntu, 3.15t)	4m 52s
test (macos, 3.12)	14m 43s
test (ubuntu, 3.11)	3m 34s
test (ubuntu, 3.14)	4m 27s
test (macos, 3.12, gix)	8m 50s
test (macos, 3.14)	11m 35s
test (macos, 3.15)	12m 23s
test (macos, 3.13)	13m 1s
test (windows, 3.15t)	31m 16s
test (windows, 3.14)	38m 48s
test (ubuntu, 3.12, gix)	3m 35s
test (windows, 3.12, gix)	31m 5s
test (windows, 3.13)	49m 34s
test (ubuntu, 3.14t)	4m 47s
test (windows, 3.11)	46m 3s
test (windows, 3.12)	52m 35s
test (windows, 3.14t)	39m 6s
test (windows, 3.15)	38m 50s
	7h 18m 16s