Nomad changes

docs/snippets/c/metadata/vector_database_integration.md

@@ -0,0 +1,60 @@
+```c title="C"
+#include "kreuzberg.h"
+#include <stdio.h>
+#include <string.h>
+
+int main(void) {
+    const char *config_json =
+        "{"
+        "\"chunking\": {"
+        "\"chunker_type\": \"character\","
+        "\"max_characters\": 512,"
+        "\"overlap\": 50,"
+        "\"embedding\": {"
+        "\"model\": {\"preset\": {\"name\": \"balanced\"}},"
+        "\"normalize\": true"
+        "}"
+        "}"
+        "}";
+
+    KREUZBERGExtractionConfig *config = kreuzberg_extraction_config_from_json(config_json);
+    if (!config) {
+        fprintf(stderr, "config parse failed (code %d): %s\n",
+                kreuzberg_last_error_code(),
+                kreuzberg_last_error_context());
+        return 1;
+    }
+
+    KREUZBERGExtractionResult *result =
+        kreuzberg_extract_file_sync("document.pdf", NULL, config);
+    if (!result) {
+        fprintf(stderr, "extraction failed (code %d): %s\n",
+                kreuzberg_last_error_code(),
+                kreuzberg_last_error_context());
+        kreuzberg_extraction_config_free(config);
+        return 1;
+    }
+
+    char *chunks_json = kreuzberg_extraction_result_chunks(result);
+    if (chunks_json) {
+        printf("Chunks with embeddings (JSON): %s\n", chunks_json);
+        kreuzberg_free_string(chunks_json);
+    } else {
+        printf("No chunks produced\n");
+    }
+
+    KREUZBERGMetadata *metadata = kreuzberg_extraction_result_metadata(result);
+    if (metadata) {
+        char *title = kreuzberg_metadata_title(metadata);
+        if (title) {
+            printf("Document title: %s\n", title);
+            kreuzberg_free_string(title);
+        }
+        kreuzberg_metadata_free(metadata);
+    }
+
+    kreuzberg_extraction_result_free(result);
+    kreuzberg_extraction_config_free(config);
+    return 0;
+}
+```