Preserve planner guard on null turn-start notifications (#305) #1226

Job	Run time
secret-scan	15s
install	25s
build-runtime-binaries (linux-arm64, ubuntu-24.04-arm)	2m 45s
build-runtime-binaries (linux-x64, ubuntu-latest)	3m 24s
build-runtime-binaries (darwin-arm64, macos-15)	3m 51s
build-runtime-binaries (darwin-x64, macos-15-intel)	7m 49s
lint-desktop	1m 25s
typecheck-desktop	1m 31s
test-ade-cli	40s
typecheck-ade-cli	53s
typecheck-web	43s
validate-docs	24s
build	56s
test-desktop (1)	2m 58s
test-desktop (5)	1m 14s
test-desktop (6)	1m 18s
test-desktop (4)	4m 33s
test-desktop (7)	1m 39s
test-desktop (8)	10m 4s
test-desktop (3)	3m 21s
test-desktop (2)	1m 29s
build-win	11m 51s
ci-pass	2s
	1h 3m 30s

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