Forecast LinkedIn bid and budget ranges

Asks LinkedIn what the auction currently costs for a targeting spec: the suggested bid and its range, the lowest and highest bid allowed, and the daily budget limits, for the objective and cost type you intend to use. It does not forecast impressions, clicks or leads. Use when: the user asks what a campaign will cost before it exists, or when choosing a bid. It is the only honest answer to "what CPC should I set" — LinkedIn's ranges vary enormously by audience and season, and a remembered benchmark is worse than no number. Do not present the forecast as a promise. It is the platform's estimate for an unproven audience, it moves week to week, and actual cost per lead depends on the landing page, which LinkedIn knows nothing about. Do not use it in place of linkedin_estimate_audience_size — a forecast against a sub-minimum audience is meaningless. Returns the suggested bid with its range, the allowed bid range and the daily budget limits, in the account currency. If LinkedIn returns nothing for this spec (it does for very narrow audiences), say the forecast is unavailable and fall back to the audience size plus the platform minimum daily budget. Do not invent a number.