Nomad changes

docs/snippets/elixir/advanced/12_keyword_extraction_config.exs

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+# Advanced keyword extraction configuration
+alias Kreuzberg.ExtractionConfig
+
+config = %ExtractionConfig{
+  keyword_extraction: %{
+    "enabled" => true,
+    "max_keywords" => 20,
+    "min_score" => 0.6,
+    "algorithm" => "tfidf"
+  }
+}
+
+{:ok, result} = Kreuzberg.extract_file("research_paper.pdf", nil, config)
+
+if result.keywords do
+  # Group by score ranges
+  high_score = Enum.filter(result.keywords, fn kw -> kw["score"] >= 0.8 end)
+  medium_score = Enum.filter(result.keywords, fn kw -> kw["score"] >= 0.6 and kw["score"] < 0.8 end)
+
+  IO.puts("High confidence keywords (#{length(high_score)}):")
+  Enum.each(high_score, fn kw -> IO.puts("  - #{kw["word"]} (#{kw["score"]})") end)
+end