Added exact search flag for vector queries

Author: YuriyIvon

src/DatabaseBenchmark/Databases/AzureSearch/AzureSearchQueryBuilder.cs

@@ -129,7 +129,8 @@ private VectorizedQuery BuildVectorizedQuery(VectorRankingQuery vectorQuery)
             var vectorizedQuery = new VectorizedQuery(vector)
             {
                 KNearestNeighborsCount = vectorQuery.Limit,
-                Weight = vectorQuery.Weight
+                Weight = vectorQuery.Weight,
+                Exhaustive = vectorQuery.Exact
             };
 
             vectorizedQuery.Fields.Add(vectorQuery.ColumnName);

src/DatabaseBenchmark/Model/VectorRankingQuery.cs

@@ -15,6 +15,8 @@ public class VectorRankingQuery : IRankingQuery
         [JsonConverter(typeof(JsonQueryConditionConverter))]
         public IQueryCondition Condition { get; set; }
 
+        public bool Exact { get; set; } = false;
+
         public int Limit { get; set; } = 10;
 
         public int? Candidates { get; set; }