fix(site-finder): dedupe competitors — same domrf_kn_objects 3x snapshots bug

backend/app/api/v1/parcels.py

@@ -177,10 +177,18 @@ def analyze_parcel(
             }
         )
 
-    # 5) Конкуренты в радиусе 3 км из DOM.РФ
+    # 5) Конкуренты в радиусе 3 км из DOM.РФ.
+    # NB: domrf_kn_objects имеет ~3 snapshot per obj_id → DISTINCT ON по
+    # latest snapshot, иначе дубликаты ЖК в выдаче.
     competitor_rows = (
         db.execute(
             text("""
+            WITH latest_obj AS (
+                SELECT DISTINCT ON (obj_id) *
+                  FROM domrf_kn_objects
+                 WHERE latitude IS NOT NULL
+                 ORDER BY obj_id, snapshot_date DESC NULLS LAST
+            )
             SELECT obj_id,
                    comm_name,
                    dev_name,
@@ -191,9 +199,8 @@ def analyze_parcel(
                        ST_SetSRID(ST_MakePoint(o.longitude, o.latitude), 4326)::geography,
                        ST_Centroid(ST_GeomFromText(:wkt, 4326))::geography
                    ) AS distance_m
-              FROM domrf_kn_objects o
+              FROM latest_obj o
-             WHERE o.latitude IS NOT NULL
+             WHERE ST_DWithin(
-               AND ST_DWithin(
                        ST_SetSRID(ST_MakePoint(o.longitude, o.latitude), 4326)::geography,
                        ST_Centroid(ST_GeomFromText(:wkt, 4326))::geography,
                        3000