Restore the plan-33 bounce slice lost in the rebuild (migration 069 survived;
the model/route/service did not). EmailBounceState model reconstructed verbatim
from the clean pyc dump. New bounce_service.BounceService maps provider payloads
(generic/SendGrid/Postmark/SES/Mailgun), records bounces correlated to
NotificationDelivery by provider_message_id, auto-mutes a recipient past
MUTE_THRESHOLD (complaints mute immediately), and the email channel skips muted
targets. Inbound webhook POST /api/v1/notifications/inbound/email (HMAC-SHA256,
404 until notify.inbound_secret set, 401 on bad sig) + operator unmute + admin
bouncing list + email_status in GET /preferences.
Route/service names/paths faithful to the salvaged test string-index; logic
reconstructed from the plan-33 doc (the route+test pycs were corrupt). Model
registration in app/models/__init__.py lands with the Phase-2 commit (shared
file). Verified: test_email_bounce.py 16 passed; notification suite no regressions.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
