durability: Fix task leak #10815

Job	Run time
Test Suite	15m 29s
Smoketests (spacetimedb-runner)	11m 26s
Lints	2m 48s
Build and test wasm bindings	7m 4s
Smoketests (windows-latest)	20m 41s
SDK Tests	51s
Test spacetimedb-update flow (aarch64-unknown-linux-gnu, arm-runner)	49s
Test spacetimedb-update flow (x86_64-pc-windows-msvc, windows-latest)	3m 20s
Check that packages are publishable	10s
Test spacetimedb-update flow (x86_64-unknown-linux-gnu, spacetimedb-runner)	1m 29s
Test spacetimedb-update flow (aarch64-apple-darwin, macos-latest)	1m 21s
	1h 5m 28s

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