Get Layer Mvt Tile

Serve an MVT tile for a layer.

v is a client-supplied cache-busting token — change it (e.g., to a timestamp) when you know the underlying data has moved. filter_id references a server-side FilterSpec (POSTed via /filters); when present, the tile contains only matching rows. Favorites-only filtering pulls the user's favorite ids inline so the tile WHERE-clause includes them — without that, the tile would visually drop the favorites filter even though the table respects it. viz names a layer column to embed as a feature property at every zoom (below the include-all zoom only the core name/owner/address columns ship otherwise) so the client can drive a value-weighted visualization; unknown columns are dropped silently.