Card catalogue: the banks and cards the Coach knows

The bank cards the Coach knows, per country of residence: each bank, then its cards, with the name printed on the card, its picture, the tier the Coach reads from that name, and the catalogueId that names the card exactly in POST /api/v1/coach/bilan. Built for a card picker: the traveller's bank, then their card, then the bilan with { catalogueId }. byBankTier says whether { bank, network, tier } would land on that same card: at a bank with two cards of one tier, only the most basic one is reachable that way. Travellers whose bank is not listed fall back to the generic { network, tier } profiles listed under generic. Signed like every endpoint, with an empty body: the query string is not signed. Does not consume quota.