Fix `LeafContext.application` Casting Failure #97

Job	Run time
unit-tests / linux-unit (swift:5.9-jammy)	3m 31s
unit-tests / linux-unit (swift:5.10-noble)	4m 25s
unit-tests / windows-unit	0s
unit-tests / linux-unit (swift:6.0-noble)	3m 44s
unit-tests / api-breakage	5m 16s
unit-tests / linux-unit (swiftlang/swift:nightly-main-jammy)	4m 47s
unit-tests / macos-unit (macos-14, latest-stable)	2m 32s
unit-tests / macos-unit (macos-15, latest-stable)	2m 32s
unit-tests / ios-unit	0s
unit-tests / lint	0s
unit-tests / musl	0s
	26m 47s

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