feat(app): add get all addresses feature

VectorSearchApp/Services/QdrantService.cs

@@ -10,6 +10,7 @@ public interface IQdrantService
     Task InitializeCollectionAsync(CancellationToken cancellationToken = default);
     Task StoreAddressAsync(Address address, float[] embedding, CancellationToken cancellationToken = default);
     Task<List<AddressEmbedding>> SearchSimilarAddressesAsync(float[] queryEmbedding, int limit = 5, float scoreThreshold = 0.0f, CancellationToken cancellationToken = default);
+    Task<List<AddressEmbedding>> GetAllAddressesAsync(CancellationToken cancellationToken = default);
 }
 
 public class QdrantService : IQdrantService
@@ -67,4 +68,22 @@ public class QdrantService : IQdrantService
             Score = r.Score
         }).ToList();
     }
+
+    public async Task<List<AddressEmbedding>> GetAllAddressesAsync(CancellationToken cancellationToken = default)
+    {
+        var response = await _client.ScrollAsync(_collectionName, limit: 10000, cancellationToken: cancellationToken);
+        
+        var addresses = new List<AddressEmbedding>();
+        foreach (var point in response.Result)
+        {
+            addresses.Add(new AddressEmbedding
+            {
+                Id = Guid.Parse(point.Id.Uuid),
+                FullAddress = point.Payload["address"].StringValue,
+                Vector = Array.Empty<float>(),
+                Score = 0f
+            });
+        }
+        return addresses;
+    }
 }