Model card: fine-tuned Qwen3 listwise generative reranker (Qdrant CVE hard negatives)

Restore model card: Qwen3 listwise generative reranker fine-tune on Qdrant hard negatives

Revert README to honest re-host description (no unverified fine-tune claim)

Update model card: listwise generative reranker fine-tune on Qdrant hard negatives

Re-host Qwen/Qwen3-Reranker-0.6B as sec-rerank for secAI pipeline