fix: filtre DAS=DP + correction D55.9→D64.9 + enrichissement supplements CIM-10

- Filtre DAS identique au DP (violation règle PMSI) dans extracteur et fusion
- Correction automatique D55.9 → D64.9 pour "Anémie" non qualifiée (70 cas)
- 17 codes ajoutés aux supplements (K59.0, Z93.1, H92.0, A87.0, D64.9, etc.)
- 436 tests OK (+14 nouveaux)

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

tests/test_fusion.py

@@ -155,6 +155,37 @@ class TestSourceFilesPopulated:
         assert result.source_files == ["a.pdf", "b.pdf"]
 
 
+class TestDasEqualDpRemoved:
+    """Vérifie que les DAS dont le code est identique au DP sont retirés après fusion."""
+
+    def test_das_same_code_as_dp_removed(self):
+        d1 = DossierMedical(
+            diagnostic_principal=Diagnostic(texte="HTA", cim10_suggestion="I10"),
+            diagnostics_associes=[
+                Diagnostic(texte="Hypertension artérielle", cim10_suggestion="I10"),
+                Diagnostic(texte="Diabète", cim10_suggestion="E11.9"),
+            ],
+        )
+        d2 = DossierMedical(
+            diagnostic_principal=Diagnostic(texte="HTA essentielle", cim10_suggestion="I10"),
+        )
+        result = merge_dossiers([d1, d2])
+        das_codes = [d.cim10_suggestion for d in result.diagnostics_associes]
+        assert "I10" not in das_codes, "DAS=DP doit être retiré"
+        assert "E11.9" in das_codes
+
+    def test_das_different_code_kept(self):
+        d1 = DossierMedical(
+            diagnostic_principal=Diagnostic(texte="Cholécystite", cim10_suggestion="K81.0"),
+            diagnostics_associes=[
+                Diagnostic(texte="HTA", cim10_suggestion="I10"),
+            ],
+        )
+        result = merge_dossiers([d1])
+        das_codes = [d.cim10_suggestion for d in result.diagnostics_associes]
+        assert "I10" in das_codes
+
+
 class TestFullMergeCROTrackare:
     def test_full_merge_cro_trackare(self):
         """Cas réel : fusion Trackare + CRO."""