Fix Cohere response (#86)

* Fix Cohere response

* Remove Adobe pdfservice from dependency

kotaemon doesn't rely more pdfservice for its core functionality,
and pdfservice uses very out-dated dependency that causes conflict.

---------

Co-authored-by: trducng <trungduc1992@gmail.com>

Author: doviettung96

libs/kotaemon/kotaemon/indices/rankings/cohere.py

@@ -29,10 +29,10 @@ def run(self, documents: list[Document], query: str) -> list[Document]:
             return compressed_docs
 
         _docs = [d.content for d in documents]
-        results = cohere_client.rerank(
+        response = cohere_client.rerank(
             model=self.model_name, query=query, documents=_docs, top_n=self.top_k
         )
-        for r in results:
+        for r in response.results:
             doc = documents[r.index]
             doc.metadata["relevance_score"] = r.relevance_score
             compressed_docs.append(doc)

libs/kotaemon/pyproject.toml

@@ -66,7 +66,6 @@ adv = [
     "unstructured[pdf]==0.13.4",
     "sentence_transformers==2.7.0",
     "elasticsearch>=8.13.0,<8.14",
-    "pdfservices-sdk @  git+https://github.com/niallcm/pdfservices-python-sdk.git@bump-and-unfreeze-requirements",
     "beautifulsoup4>=4.12.3,<4.13",
 ]
 dev = [