feat: add moderation decision history

apps/api/app/main.py

@@ -31,8 +31,9 @@ from .routers.activity import router as activity_router
 from .routers.catalog import router as catalog_router
 from .routers.public_data import router as public_data_router
 from .routers.submissions import router as submissions_router
+from .time_utils import aware
 from .public_cache import public_cache
-from .schemas import ActivityOut, AdminCatchReportOut, CatchReportAccepted, CatchReportCreate, CatchReportCreated, ExternalAliasSuggestionOut, ExternalObservationDecision, ExternalObservationMapping, ExternalObservationOut, ExternalObservationPublished, ImportRunOut, ModerationUpdate
+from .schemas import ActivityOut, AdminCatchReportOut, AdminModerationHistoryOut, CatchReportAccepted, CatchReportCreate, CatchReportCreated, ExternalAliasSuggestionOut, ExternalObservationDecision, ExternalObservationMapping, ExternalObservationOut, ExternalObservationPublished, ImportRunOut, ModerationUpdate
 from .storage import ScreenshotError, client as storage_client, delete_screenshot, signed_screenshot_url, upload_screenshot
 from .submission_security import check_rate_limit
 from .submission_security import is_trusted_proxy as _is_trusted_proxy
@@ -133,6 +134,34 @@ def admin_diagnostics(db: Db, _: Annotated[str, Depends(_admin)]) -> JSONRespons
     return JSONResponse(payload, headers={"Content-Disposition": "attachment; filename=rf4spotter-diagnostics.json"})
 
 
+@app.get("/api/v1/admin/moderation-history", response_model=list[AdminModerationHistoryOut])
+def admin_moderation_history(
+    db: Db,
+    _: Annotated[str, Depends(_admin)],
+    limit: int = Query(50, ge=1, le=200),
+    offset: int = Query(0, ge=0),
+) -> list[AdminModerationHistoryOut]:
+    report_events = list(db.scalars(
+        select(ModerationEvent).order_by(ModerationEvent.created_at.desc()).limit(limit + offset)
+    ))
+    external_events = list(db.scalars(
+        select(ExternalObservation).where(ExternalObservation.reviewed_at.is_not(None))
+        .order_by(ExternalObservation.reviewed_at.desc()).limit(limit + offset)
+    ))
+    history = [AdminModerationHistoryOut(
+        entity_type="catch_report", entity_id=event.catch_report_id,
+        decided_at=event.created_at, action=event.new_status.value,
+        moderator=event.moderator, reason=event.reason,
+    ) for event in report_events]
+    history.extend(AdminModerationHistoryOut(
+        entity_type="external_observation", entity_id=observation.id,
+        decided_at=observation.reviewed_at, action=observation.status,
+        moderator=None, reason=observation.review_note,
+    ) for observation in external_events if observation.reviewed_at is not None)
+    history.sort(key=lambda event: aware(event.decided_at), reverse=True)
+    return history[offset:offset + limit]
+
+
 @app.get("/api/v1/admin/imports", response_model=list[ImportRunOut])
 def admin_imports(
     db: Db,