Global administrators can set delivery journal retention (7-365 days) in SQLite;
SEND_LOG_RETENTION_DAYS seeds the initial default and the log-tailer re-reads
the value every prune cycle without a restart.
Co-authored-by: Cursor <cursoragent@cursor.com>
Lay out view, auth, validate, and handlers under internal/web while keeping
the cmd/panel API unchanged; update roadmap and changelog for web-split closure.
Co-authored-by: Cursor <cursoragent@cursor.com>
mix