Weaviate - expose Hybrid Search (#4127)

Hybrid Search for Weaviate

packages/components/nodes/vectorstores/Weaviate/Weaviate.ts

@@ -26,7 +26,7 @@ class Weaviate_VectorStores implements INode {
     constructor() {
         this.label = 'Weaviate'
         this.name = 'weaviate'
-        this.version = 3.0
+        this.version = 4.0
         this.type = 'Weaviate'
         this.icon = 'weaviate.png'
         this.category = 'Vector Stores'
@@ -124,6 +124,16 @@ class Weaviate_VectorStores implements INode {
             }
         ]
         addMMRInputParams(this.inputs)
+        this.inputs.push({
+            label: 'Alpha (for Hybrid Search)',
+            name: 'alpha',
+            description:
+                'Number between 0 and 1 that determines the weighting of keyword (BM25) portion of the hybrid search. A value of 1 is a pure vector search, while 0 is a pure keyword search.',
+            placeholder: '1',
+            type: 'number',
+            additionalParams: true,
+            optional: true
+        })
         this.outputs = [
             {
                 label: 'Weaviate Retriever',