feat(sdk): portable Argus CLI — pip install, Docker execution, MCP server, CI preflight #47

Job	Run time
Build Images (scanner-opengrep, docker/Dockerfile.opengrep)	16s
Build Images (scanner-bandit, docker/Dockerfile.bandit)	26s
Build Images (scanner-supply-chain, docker/Dockerfile.supply-chain)	19s
Build Images (cli, docker/Dockerfile.cli)	57s
Test Argus CLI	1m 21s
Scan cli	4m 55s
Scan scanner-opengrep	2m 54s
Scan scanner-supply-chain	1m 13s
Scan scanner-bandit	3m 5s
Container Scan Summary	10s
Build Images (scanner-bandit, docker/Dockerfile.bandit)	26s
Build Images (cli, docker/Dockerfile.cli)	57s
Build Images (scanner-supply-chain, docker/Dockerfile.supply-chain)	19s
Build Images (scanner-opengrep, docker/Dockerfile.opengrep)	16s
Scan scanner-supply-chain	1m 26s
Test Argus CLI	1m 21s
Scan scanner-bandit	3m 5s
Scan cli	4m 55s
Scan scanner-opengrep	2m 54s
Container Scan Summary	14s
	31m 29s

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