RCBC-517: Support vector search prefilter (#180)

Author: DemetrisChr

lib/couchbase/search_options.rb

@@ -321,8 +321,8 @@ def to_h
     # @yieldparam [BooleanFieldQuery] query
     #
     # @return [BooleanFieldQuery]
-    def self.boolean_field(value)
-      BooleanFieldQuery.new(value)
+    def self.boolean_field(value, &)
+      BooleanFieldQuery.new(value, &)
     end
 
     # Allow to match `true`/`false` in a field mapped as boolean.
@@ -1073,6 +1073,9 @@ class VectorQuery
     # @return [Float, nil]
     attr_accessor :boost
 
+    # @return [SearchQuery, nil]
+    attr_accessor :prefilter
+
     # Constructs a +VectorQuery+ instance
     #
     # @overload initialize(vector_field_name, vector_query)
@@ -1111,6 +1114,8 @@ def to_h
         boost: boost,
       }.compact
 
+      h[:filter] = prefilter.to_h unless prefilter.nil?
+
       raise Error::InvalidArgument, "The vector cannot be nil" if !h.include?(:vector) && !h.include?(:vector_base64)
       raise Error::InvalidArgument, "The vector query cannot be an empty array" if h.include?(:vector) && h[:vector].empty?