diff --git a/app/models/outbox.py b/app/models/outbox.py
index dd7fe35..833a822 100644
--- a/app/models/outbox.py
+++ b/app/models/outbox.py
@@ -5,7 +5,7 @@ from __future__ import annotations
 import uuid
 from datetime import datetime
 
-from sqlalchemy import DateTime, Integer, String, Text, func
+from sqlalchemy import DateTime, ForeignKey, Integer, String, Text, UniqueConstraint, func
 from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column
@@ -77,3 +77,49 @@ class EventOutbox(Base):
     failed_at: Mapped[datetime | None] = mapped_column(
         DateTime(timezone=True), nullable=True,
     )
+
+
+class OutboxDelivery(Base):
+    """Per-consumer delivery status for an event_outbox row (Migration 0075).
+
+    Tracks whether each consumer successfully processed an event; an event is
+    only 'published' when all mandatory deliveries succeed.
+    """
+
+    __tablename__ = "outbox_deliveries"
+    __table_args__ = (
+        UniqueConstraint(
+            "event_id", "consumer_name",
+            name="uq_outbox_deliveries_event_consumer",
+        ),
+    )
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        PGUUID(as_uuid=True), primary_key=True,
+        server_default=func.gen_random_uuid(),
+    )
+    event_id: Mapped[uuid.UUID] = mapped_column(
+        PGUUID(as_uuid=True),
+        ForeignKey("event_outbox.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    consumer_name: Mapped[str] = mapped_column(String(150), nullable=False)
+    status: Mapped[str] = mapped_column(
+        String(30), nullable=False, server_default="pending",
+    )
+    attempt_count: Mapped[int] = mapped_column(
+        Integer, nullable=False, server_default="0",
+    )
+    next_attempt_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True,
+    )
+    last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
+    processed_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True,
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now(),
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now(),
+    )
diff --git a/docs/test-bugs.md b/docs/test-bugs.md
index 8769cdc..1a9a27a 100644
--- a/docs/test-bugs.md
+++ b/docs/test-bugs.md
@@ -478,7 +478,7 @@ Playwright E2E: 10 passed, 24 failed (BUG-011/012/013 — Mock-Daten und data-te
 - **Erwartet:** Alle pytest Tests bestehen
 - **Tatsächlich:** Mehrere Tests fehlgeschlagen (F..F.F..FF, FFFFFFFF)
 - **Schweregrad:** Medium
-- **Status:** ⏳ Nicht gefixt — muss genauer untersuchen welche Tests fehlschlagen
+- **Status:** ✅ Teilweise erledigt 2026-08-24 (Block E/I-C): Outbox-Cluster (12 Failures in test_outbox+test_outbox_phase5) BEHOBEN — Root-Cause exakt bewiesen: create_all-basierte Test-Schema fehlte outbox_deliveries-Tabelle UND den uq_outbox_deliveries_event_consumer UniqueConstraint (ON CONFLICT im Produktionscode schlug fehl). Fix: OutboxDelivery-Model in app/models/outbox.py ergänzt (Migration-0075-konform inkl. UniqueConstraint); Beweistest 23/23 grün. Verbleibende Failures anderer Suiten einzeln triagieren.
 
 ### BUG-068: Field-Level Permissions nicht implementiert in contacts routes
 - **Kategorie:** Rechte-System