tests: alias DLBCL + garde-fou Trackare + e2e PDFs réels + gold CRH + benchmark enrichi

- 11 tests unitaires : TestAliasAndConclusionBonus (7) + TestTrackareSymptomGuard (4)
- Tests e2e sur PDFs réels (skip si absent) : méningite A87.0 + DLBCL C83.3 top1
- Gold CRH enrichi : 5 cas (2 réels ajoutés : 115_23066188, 132_23080179)
- Benchmark synthese : récupération conclusion depuis source_excerpt des DAS/traitements
- .gitignore : protection anti-PHI (real_crh_pdfs/, data/crh_samples/*.pdf)
- docs/PHI_POLICY.md : 7 règles de sécurité PHI
- Rapports debug : case 132 REVIEW (garde-fou actif), top errors, DIM pack

1043 tests passent, 0 régression.

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

docs/gold_debug/case_115_23066188.json

@@ -0,0 +1,40 @@
+{
+  "case_id": "115_23066188",
+  "document_type": "trackare",
+  "gold": {
+    "dp_expected": {
+      "code": "A87.0",
+      "label": "Méningite à entérovirus"
+    },
+    "dp_acceptable_codes": [],
+    "dp_acceptable_family3": [
+      "A87"
+    ],
+    "allow_symptom_dp": false,
+    "confidence": "probable"
+  },
+  "prediction": {
+    "chosen_code": "A87.0",
+    "chosen_term": "Méningite à entérovirus",
+    "verdict": "CONFIRMED",
+    "confidence": "high",
+    "reason": "DP Trackare — source d'autorité",
+    "review_reason_tag": "other",
+    "evidence": [
+      "Source: Trackare (codage établissement)"
+    ],
+    "evidence_count": 1
+  },
+  "pool_stats": {
+    "raw_pool_size": 6,
+    "filtered_pool_size": 0,
+    "topk_size": 0
+  },
+  "top_candidates": [],
+  "match_eval": {
+    "strict_match": true,
+    "acceptable_match": true,
+    "family3_match": true,
+    "symptom_not_allowed": false
+  }
+}