Get all available filter options for the vehicles list.

Returns:

• pontos_venda: List of points of sale for the company
• estados: List of vehicle states (Stock, Reservado, Vendido, etc.)
• marcas: List of all brands
• combustiveis: List of fuel types
• caixas: List of gearbox types
• fornecedores: Clients referenced as supplier by this company's vehicles
• price_range: Min/max price from company vehicles
• year_range: Min/max year from company vehicles
• km_range: Min/max kilometers from company vehicles
• boolean_filters: List of boolean filter options
• sort_options: Available sort fields

Served stale-while-refresh since 2026-10-07. Until then every vehicles-page load re-ran its nine queries, including a Fornecedores query that cost ~3 s of CPU per run, and the post-deploy reload herd multiplied that. The payload depends on the company alone (no PV, user, permission or query input), so idcompany is the whole key. It lags a change (a new supplier, a new price extreme) by about the 5-min fresh window, and longer only while refreshes fail.