b78bd979dc
New escalate_to_collections action: when the 3-reminder loop ends still unpaid, consolidate ONE email to the admin — customer data, outstanding (invoice + late fees − paid), and the invoice PDF attached — ready to forward to an Inkasso agency / for Betreibung. Internal mail, sent immediately; does NOT touch the invoice. New invoice_collections_handoff email template (en + native de, seeded by the boot self-heal). Wired into the built-in dunning flow: loop 'exit' → collections → end (seed v4, re-seeds the disabled built-in). Selectable + labelled in the canvas editor. Tests 9/9, tsc 0, build green.