Return the allowed collections map (jsonb) for policy checks

Return true if this member type can renew loans

@spec can_reserve?(
  t :: %Voile.Schema.Master.MemberType{
    __meta__: term(),
    allowed_collections: term(),
    auto_renew: term(),
    can_renew: term(),
    can_reserve: term(),
    currency: term(),
    description: term(),
    digital_access: term(),
    exhibition_preview_access: term(),
    fine_per_day: term(),
    id: term(),
    inserted_at: term(),
    institutional: term(),
    is_active: term(),
    max_concurrent_loans: term(),
    max_days: term(),
    max_event_bookings_per_year: term(),
    max_fine: term(),
    max_items: term(),
    max_renewals: term(),
    max_reserves: term(),
    membership_fee: term(),
    membership_period_days: term(),
    metadata: term(),
    name: term(),
    priority_level: term(),
    publicly_listed: term(),
    recurrence_interval: term(),
    recurrence_unit: term(),
    shop_discount_percent: term(),
    slug: term(),
    ticket_discount_percent: term(),
    updated_at: term()
  }
) :: boolean()

Return true if this member type can make reservations

Compute ends_at given a start_date (DateTime) and the member type's membership_period_days. Returns {:ok, DateTime} or :no_period.

Example: MemberType.compute_ends_at(member_type, ~U[2025-01-01 00:00:00Z])

Compute next renewal datetime using recurrence_unit and recurrence_interval.

• Supports recurrence_unit: "days" out of the box.
• For "months" or "years" we recommend using Timex or Calendar operations in your application code because months/years are variable-length. Returns {:ok, DateTime} | :not_applicable | {:error, reason}.

Return a map summarizing entitlements / quotas for UI or checks

Return true if member type is institutional

Max number of items this member type can borrow

Use for patch-style updates where not all fields are present