Persist durable event consumer delivery state

src/govoplan_audit/backend/api/v1/schemas.py

@@ -53,3 +53,29 @@ class AuditLogItemResponse(BaseModel):
 
 class AuditLogListResponse(BaseModel):
     items: list[AuditLogItemResponse]
+
+
+class EventDeliveryMetricsResponse(BaseModel):
+    events: dict[str, int] = Field(default_factory=dict)
+    deliveries: dict[str, int] = Field(default_factory=dict)
+    consumers: dict[str, dict[str, int]] = Field(default_factory=dict)
+    oldest_due_at: datetime | None = None
+
+
+class EventDeliveryReplayRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    reason: str = Field(min_length=1, max_length=2000)
+
+
+class EventDeliveryReplayResponse(BaseModel):
+    event_id: str
+    consumer_id: str
+    delivery_key: str
+    status: str
+    attempts: int
+    replay_count: int
+    last_replayed_at: datetime | None = None
+    last_replayed_by: str | None = None
+    last_replay_reason: str | None = None
+    last_error: str | None = None