Enable dynamic relevance threshold

Frontend can specify the semantic similarity

ots/llm/meta#73

django-torque-semantic-search/semantic_search/receivers.py

@@ -83,10 +83,11 @@ def rebuild_semantic_search_index(sender, **kwargs):
 
 @receiver(search_filter)
 def semantic_filter(sender, **kwargs):
-    similarity = getattr(settings, "SEMANTIC_SEARCH_SIMILARITY", 0.7)
-
     cache_documents = kwargs["cache_documents"]
     qs = kwargs.get("qs")
+    relevance = kwargs.get("relevance")
+
+    similarity = float(relevance or getattr(settings, "SEMANTIC_SEARCH_SIMILARITY", 0.7))
 
     if qs:
         embeddings = local_llm.get_embeddings(qs, prompt_name="query")