Threads an optional `source` through DraftInput/insertDocRow (default 'hq',
preserving current behaviour when omitted), tags module renewals as
'module_renewal', and adds generateBulkSmsPurchaseQuote — an ad-hoc bulk SMS
credit top-up priced via the existing usage rate card, tagged
'bulk_sms_topup' so the client-detail document list can distinguish it from a
subscription renewal. New route: POST /client-modules/:id/bulk-sms-quote.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Thomas Joise