docs(plan): record M016 evidence deviation and complete milestone

docs/3d/maze32-command-chamber/plans/floor-plan.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="900" height="900" viewBox="0 0 900 900"><rect width="900" height="900" fill="white"/><g fill="none" stroke="#111" stroke-width="6"><rect x="130" y="130" width="640" height="640"/><path d="M370 130H530" stroke="white" stroke-width="18"/><path d="M370 130H530"/><circle cx="450" cy="450" r="135"/><circle cx="450" cy="450" r="215" stroke="#777" stroke-dasharray="14 10"/><circle cx="450" cy="235" r="40"/><circle cx="665" cy="450" r="40"/><circle cx="450" cy="665" r="40"/><circle cx="235" cy="450" r="40"/><rect x="370" y="65" width="160" height="65"/><path d="M450 315V130M585 450H770M450 585V770M315 450H130" stroke="#777" stroke-width="4" stroke-dasharray="12 12"/></g><g font-family="sans-serif" font-size="20" fill="#111"><text x="450" y="35" text-anchor="middle">LOWER-ROOM PLAN — 12 m × 12 m</text><text x="450" y="457" text-anchor="middle">command table</text><text x="450" y="242" text-anchor="middle">station</text><text x="670" y="457" text-anchor="middle">station</text><text x="450" y="672" text-anchor="middle">station</text><text x="230" y="457" text-anchor="middle">station</text><text x="450" y="110" text-anchor="middle">3 m arrival + apron</text><text x="610" y="320">1.4 m circulation ring</text><text x="700" y="810">black: shell · dashed: paths</text></g></svg>

docs/3d/maze32-command-chamber/plans/north-elevation.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="900" height="500" viewBox="0 0 900 500"><rect width="900" height="500" fill="white"/><path d="M110 430V90H790V430H110" fill="none" stroke="#111" stroke-width="6"/><path d="M365 430V170H535V430" fill="none" stroke="#111" stroke-width="6"/><path d="M110 90H790" stroke="#777" stroke-width="3" stroke-dasharray="12 10"/><g font-family="sans-serif" font-size="20" fill="#111"><text x="450" y="45" text-anchor="middle">NORTH WALL ELEVATION</text><text x="450" y="470" text-anchor="middle">arrival portal: 3.0 m wide × 3.1 m high · actual Boolean aperture</text><text x="700" y="120">ceiling: 5.2 m</text></g></svg>

docs/3d/maze32-command-chamber/plans/reflected-ceiling-plan.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="900" height="900" viewBox="0 0 900 900"><rect width="900" height="900" fill="white"/><g fill="none" stroke="#111" stroke-width="6"><rect x="130" y="130" width="640" height="640"/><path d="M370 130H530" stroke="white" stroke-width="18"/><path d="M370 130H530"/><circle cx="450" cy="450" r="170"/><circle cx="450" cy="450" r="230" stroke="#777" stroke-dasharray="14 10"/><circle cx="450" cy="450" r="35"/></g><g font-family="sans-serif" font-size="20" fill="#111"><text x="450" y="35" text-anchor="middle">REFLECTED CEILING PLAN — 12 m × 12 m</text><text x="450" y="455" text-anchor="middle">central suspended beacon</text><text x="450" y="285" text-anchor="middle">ceiling light ring</text><text x="450" y="700" text-anchor="middle">outer trim ring</text></g></svg>