Nomad changes

docs/snippets/swift/metadata/vector_database_integration.md

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+```swift title="Swift"
+import Foundation
+import Kreuzberg
+import RustBridge
+
+struct VectorRecord {
+    let id: String
+    let content: String
+    let embedding: [Float]
+    let metadata: [String: String]
+}
+
+let configJson = """
+{
+    "chunking": {
+        "max_characters": 512,
+        "overlap": 50,
+        "embedding": {
+            "model": {"preset": {"name": "balanced"}},
+            "batch_size": 32,
+            "normalize": true
+        }
+    }
+}
+"""
+
+let documentId = "doc_001"
+let config = try extractionConfigFromJson(configJson)
+let result = try extractFileSync("document.pdf", nil, config)
+
+var records: [VectorRecord] = []
+
+if let chunks = result.chunks() {
+    for (index, chunk) in chunks.enumerated() {
+        guard let embedding = chunk.embedding() else { continue }
+
+        let content = chunk.content().toString()
+        let vector = embedding.map { $0 }
+
+        var metadata: [String: String] = [:]
+        metadata["document_id"] = documentId
+        metadata["chunk_index"] = String(index)
+        metadata["content_length"] = String(content.count)
+
+        records.append(VectorRecord(
+            id: "\(documentId)_chunk_\(index)",
+            content: content,
+            embedding: vector,
+            metadata: metadata
+        ))
+    }
+}
+
+print("Generated \(records.count) vector records")
+```