feat: add external observation review queue

apps/api/app/schemas.py

@@ -161,3 +161,40 @@ class ModerationUpdate(BaseModel):
         if value not in {"approved", "rejected", "pending"}:
             raise ValueError("unknown moderation status")
         return value
+
+
+class ExternalObservationOut(BaseModel):
+    id: UUID
+    source_system: str
+    source_external_id: str
+    source_url: str
+    fish_name: str
+    fish_external_id: str | None
+    waterbody_name: str
+    waterbody_external_id: str | None
+    x: int | None
+    y: int | None
+    weight_g: int | None
+    published_at: datetime | None
+    last_seen_at: datetime
+    status: str
+    fish_slug: str | None
+    waterbody_slug: str | None
+    catch_report_id: UUID | None
+    review_note: str | None
+
+
+class ExternalObservationMapping(BaseModel):
+    fish_slug: str
+    waterbody_slug: str
+    note: str | None = Field(default=None, max_length=1000)
+
+
+class ExternalObservationDecision(BaseModel):
+    reason: str = Field(min_length=1, max_length=1000)
+
+
+class ExternalObservationPublished(BaseModel):
+    observation_id: UUID
+    catch_report_id: UUID
+    status: str