Create a Stripe checkout link for an eSIM package. MANDATORY PRE-STEP: before calling this tool you MUST know the customer's BILLING/RESIDENCE country (not the travel destination). If you don't have it from the conversation, ASK the user explicitly and WAIT for the answer - do NOT guess from destination, IP, or language. Pass it as customer_country (ISO-3166-1 alpha-2). The optional activation_mode field uses internal API values only. NEVER show NOW, FIRST_USE, ON_DEMAND, activation_mode, or similar technical identifiers to the customer. Use these customer-facing names instead: Activate now, Activate on arrival, Manual activation. If the customer has not already said when they want validity to start, ask naturally: 'Would you like to activate it right now, or when you land? There is a manual option available too, but you will need to access AskMia.app settings to activate.' Use Activate now only if the customer is already at the destination, Activate on arrival for automatic activation when the phone connects at the destination, and Manual activation only if the customer explicitly wants control from AskMia.app. IMPORTANT: Worldwide/global plans do not support Activate on arrival; ask whether the customer prefers Activate now or Manual activation. MANDATORY POST-STEP: relay the returned `tax_note`, `activation_note` and `post_payment_note` verbatim before they click pay. AFTER sending payment_url you MUST STOP, then call `check_order_status` with the returned session_id; do not assume the eSIM is ready based on the user saying 'I paid'. Open access (2/min per IP), or pass a Bearer API key for 60/min.