feat: streaming ClaML parser for ICD metadata and titles

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/claml_tests.rs

@@ -0,0 +1,13 @@
+use alpha_id::claml;
+
+#[test]
+fn parses_real_claml_meta_and_titles() {
+    let map = claml::load("icd-claml/Klassifikationsdateien/icd10gm2026syst_claml_20250912.xml").unwrap();
+    let a010 = map.get("A01.0").expect("A01.0 present");
+    assert_eq!(a010.para295, "P");          // billable primary
+    assert_eq!(a010.chapter, "01");
+    assert!(a010.description.contains("Typhus abdominalis"));
+    let a01 = map.get("A01").expect("A01 present");
+    assert_eq!(a01.para295, "V");           // 3-digit non-codable
+    assert!(map.len() > 10_000);
+}