refactor: remove disk limit from host resource management #75

Job	Run time
verify / Image Size Regression (BASE-04 ≤ 2GB)	1m 20s
verify / Performance Benchmark (synthetic 10k, local baseline)	1m 11s
verify / Build (macOS)	48s
verify / Go Tests	1m 59s
verify / Cross Compile (linux/amd64, linux/arm64)	1m 8s
verify / Web Build	13s
verify / Lint — no bare sleep in tests/e2e	5s
create-release	-1s
publish-images	0s
build-binaries	0s
update-homebrew	0s
	6m 43s

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