fix: resolve JOIN explosion from duplicate gene_ids across evidence tables

- scoring/integration.py: Use CTEs with GROUP BY gene_id to deduplicate
  all evidence tables before LEFT JOIN (gnomAD had 211K rows for 18K
  genes due to per-transcript data; annotation/localization also had dupes)
- literature/transform.py: Deduplicate gene_symbols before PubMed queries
  to avoid querying the same symbol multiple times
- evidence_cmd.py: Fix Polars .alias() error in literature summary display
- Updated report results with full 6-layer scoring (44 HIGH, 7268 MEDIUM)
- Validation PASSED: known Usher genes median percentile 86.9%

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

data/report/reproducibility.json

@@ -1,6 +1,6 @@
 {
-  "run_id": "5f00f9da-e548-4a58-b1b3-028d05c94d32",
-  "timestamp": "2026-02-12T18:43:00.223842+00:00",
+  "run_id": "0bcdae80-84c2-486b-809a-36040ce4821d",
+  "timestamp": "2026-02-15T20:47:54.482074+00:00",
   "pipeline_version": "0.1.0",
   "parameters": {
     "gnomad": 0.2,
@@ -49,9 +49,9 @@
   ],
   "validation_metrics": {},
   "tier_statistics": {
-    "total": 18116,
-    "high": 0,
-    "medium": 2151,
-    "low": 15965
+    "total": 19342,
+    "high": 44,
+    "medium": 7268,
+    "low": 12030
   }
 }