Reranker ignores top_n

[mkhludnev]

LocalAI version:
v2.20.1

Environment, CPU architecture, OS, and Version:
linux

Describe the bug
/v1/rerank ignores top_n

To Reproduce

$ curl -k https://localai.dev.....com/v1/rerank   -H "Content-Type: application/json"   -d '{                              
  "model": "bge-reranker-v2-m3",
  "query": "Organic skincare products for sensitive skin",
  "documents": [                                
    "Eco-friendly kitchenware for modern homes",
    "Biodegradable cleaning supplies for eco-conscious consumers",
    "Organic cotton baby clothes for sensitive skin",
    "Natural organic skincare range for sensitive skin",
    "Tech gadgets for smart homes: 2024 edition",
    "Sustainable gardening tools and compost solutions",
    "Sensitive skin-friendly facial cleansers and toners",
    "Organic food wraps and storage solutions",
    "All-natural pet food for dogs with allergies",
    "Yoga mats made from recycled materials"
  ],        
  "top_n": 1
}'
{"model":"bge-reranker-v2-m3","usage":{"total_tokens":69,"prompt_tokens":6},"results":[{"index":3,"document":{"text":"Natural organic skincare range for sensitive skin"},"relevance_score":6.8359375},{"index":6,"document":{"text":"Sensitive skin-friendly facial cleansers and toners"},"relevance_score":0.14794921875},{"index":2,"document":{"text":"Organic cotton baby clothes for sensitive skin"},"relevance_score":-1.0166015625},{"index":7,"document":{"text":"Organic food wraps and storage solutions"},"relevance_score":-8.28125},{"index":1,"document":{"text":"Biodegradable cleaning supplies for eco-conscious consumers"},"relevance_score":-8.4296875},{"index":8,"document":{"text":"All-natural pet food for dogs with allergies"},"relevance_score":-10.625},{"index":0,"document":{"text":"Eco-friendly kitchenware for modern homes"},"relevance_score":-11.015625},{"index":9,"document":{"text":"Yoga mats made from recycled materials"},"relevance_score":-11.015625},{"index":5,"document":{"text":"Sustainable gardening tools and compost solutions"},"relevance_score":-11.0390625},{"index":4,"document":{"text":"Tech gadgets for smart homes: 2024 edition"},"relevance_score":-11.046875}]}

Expected behavior
expected to get single result.

Additional context

working on mkhludnev/langchain-localai#7

[mkhludnev]

I don't see top_n cropping

LocalAI/backend/python/rerankers/backend.py

Line 83 in b87b41e

) for res in ranked_results.results

neither here

LocalAI/backend/cpp/llama-cpp/grpc-server.cpp

Line 930 in b87b41e

for (const auto& response : responses) {