Elevation & Contour Tiles

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Server-side generation of vector tiles from elevation data (DEMs), starting with contour lines.

Pre-computing contour lines on the server keeps the CPU budget on the client low - useful for MapLibre Native targets and shared/cacheable rendering - while letting Martin act as a forwarding layer in front of remote DEM sources.

Scope under design:

• Decode DEM formats into a raw elevation buffer
• Generate isolines via the contour crate with configurable intervals and major/minor attributes
• Emit MVT layers consumable by any MapLibre style
• Reusable upstream-forwarding service so other backends can share remote data plumbing

Prototype work by @anjx123.