Five per-contact boolean flags (certs / qc / quotes-so / invoices /
global), native Odoo delivery-location child contacts reused for
per-location routing, and a single resolver on res.partner that the
dispatcher + all mail-send sites call. Fallback to self.email keeps
existing customers bit-identical when no flags are set.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
f9e1b62409
