fix: type admin API contracts

apps/api/app/schemas.py

@@ -287,3 +287,38 @@ class SourceStatusOut(BaseModel):
     last_started_at: datetime | None
     last_success_at: datetime | None
     observations: int
+
+
+class AdminSourceStatusOut(BaseModel):
+    source_system: str
+    name: str
+    status: str
+    last_started_at: datetime | None
+    last_success_at: datetime | None
+    next_allowed_at: datetime | None
+    cooldown_seconds: int
+    recent_failures_24h: int
+    backoff_recommended: bool
+
+
+class AdminMediaDerivativeOut(BaseModel):
+    role: str | None
+    format: str | None
+    width: int | None
+    height: int | None
+
+
+class AdminMediaReviewOut(BaseModel):
+    id: str
+    status: str
+    entity_type: str | None
+    entity_key: str | None
+    label: str | None
+    width: int | None
+    height: int | None
+    content_type: str | None
+    image_url: str
+    source_system: str
+    source_url: str
+    duplicate_of: str | None
+    derivatives: list[AdminMediaDerivativeOut]