ci: add windows fast security-boundary test slice #114

Job	Run time
docs build	18s
cargo fmt	8s
session replay (fast) (windows-latest)	1m 26s
bedrock feature compile (fast)	17s
loopforge cli (fast) (windows-latest)	1m 36s
security boundaries (fast) (windows)	3m 1s
gitleaks	5s
session replay (fast) (ubuntu-latest)	20s
cargo test (macos-latest)	1m 17s
cargo test (ubuntu-latest)	1m 7s
cargo test (windows-latest)	3m 34s
loopforge cli (fast) (ubuntu-latest)	19s
scripts tests	5s
versioning guard (PR)	0s
	13m 33s

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