Get monthly budget
Free tier: f_budget policy. Pro+: same monthly fields derived from Budget Control (shared with GET /policies/budget-control).
Response
data: MonthlyBudgetResponse
Errors
401
Unauthorized Error
500
Internal Server Error
Free tier: f_budget policy. Pro+: same monthly fields derived from Budget Control (shared with GET /policies/budget-control).
data: MonthlyBudgetResponse