Fix issues with AsyncBufferSequence.LineSequence #119

Job	Run time
CMake Build	46s
Test / Windows (6.1 - windows-2022)	6m 44s
Test / Windows (nightly-main - windows-2019)	9m 55s
Test / macOS (Xcode 16.3 - sequoia - ARM64)	1m 54s
Test / Linux (6.1 - noble)	48s
Test / Linux (6.1 - jammy)	52s
Test / Linux (6.1 - rhel-ubi9)	56s
Test / Linux (nightly-main - noble)	1m 1s
Test / Linux (6.1 - focal)	53s
Test / Linux (nightly-main - focal)	1m 3s
Test / Linux (nightly-main - jammy)	1m 1s
Test / Linux (nightly-main - rhel-ubi9)	1m 47s
Soundness / API breakage check	0s
Soundness / License headers check	4s
Soundness / Broken symlinks check	6s
Soundness / Format check	0s
Soundness / Shell check	31s
Soundness / Unacceptable language check	0s
Soundness / YAML lint check	4s
Soundness / Python lint check	8s
Soundness / Documentation check	0s
	28m 33s

Provide feedback