Merge release/v1.6.1 into main (v1.6.1) #827

Job	Run time
Dockerfile lint (hadolint)	5s
Python lint + format (ruff)	7s
Workflow audit (zizmor)	6s
Frontend logic tests (node --test)	10s
Shell tests (shellcheck + pithead suite)	3m 41s
Secret scan (gitleaks)	9s
Build image (monero)	1m 1s
Build image (xmrig-proxy)	30s
Compose config + security hardening	7s
Lint per-surface (biome, yaml, markdown, proto, toml)	23s
Dashboard tests (pytest + coverage)	44s
Build image (tor)	18s
Dashboard image (Docker test stage)	44s
Build image (dashboard)	35s
Build image (p2pool)	45s
	9m 25s

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