Improved — exporting to Braze overwrites by name instead of piling up duplicates

What shipped

• •Overwrite by name is the default — the exporter lists existing Braze email templates once per batch and UPDATES any whose name matches the Stripo email's name, instead of always creating. Re-export the same forty-email program as many times as you like and you get forty templates, not eighty. Each row reports operation (create or update) and matched_by (id, name, or none) so you can see exactly what happened.
• •Precedence is explicit — a braze_template_map you pass still wins per email id (the most precise control), then a name match, then create-new. Two switches cover the edges: force_create makes fresh templates on purpose even when a same-named one exists, and dedupe_by_name:false skips the existence check entirely.
• •Safe by construction — if two Braze templates already share a name the export updates the first and flags the duplicate so you can tidy it, rather than guessing silently; and if the one-time listing call fails the export degrades to create rather than sinking the batch.