feat: 재고 원장 참고번호에 처방명 추가

## 개선사항
- 출고시 참고번호에 처방명 표시
  - 기존: 조제#1
  - 변경: 조제#1 (직접조제)
  - 처방이 있는 경우: 조제#2 (쌍화탕)

## 표시 형식
- 입고: PR-20260211-0001 (입고장번호)
- 출고(처방전O): RX-2024-001 (쌍화탕)
- 출고(처방전X): 조제#1 (직접조제)

이제 입출고 내역에서 어떤 처방으로 소비되었는지 바로 확인 가능

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app.py

@@ -1102,7 +1102,11 @@ def get_stock_ledger():
                         s.name as supplier_name,
                         CASE
                             WHEN sl.event_type = 'PURCHASE' OR sl.event_type = 'RECEIPT' THEN pr.receipt_no
-                            WHEN sl.event_type = 'CONSUME' THEN COALESCE(c.prescription_no, '조제#' || c.compound_id)
+                            WHEN sl.event_type = 'CONSUME' THEN
+                                CASE
+                                    WHEN c.prescription_no IS NOT NULL THEN c.prescription_no || ' (' || COALESCE(f.formula_name, '직접조제') || ')'
+                                    ELSE '조제#' || c.compound_id || ' (' || COALESCE(f.formula_name, '직접조제') || ')'
+                                END
                             ELSE NULL
                         END as reference_no,
                         CASE
@@ -1116,6 +1120,7 @@ def get_stock_ledger():
                     LEFT JOIN purchase_receipts pr ON sl.reference_table = 'purchase_receipts' AND sl.reference_id = pr.receipt_id
                     LEFT JOIN compounds c ON sl.reference_table = 'compounds' AND sl.reference_id = c.compound_id
                     LEFT JOIN patients p ON c.patient_id = p.patient_id
+                    LEFT JOIN formulas f ON c.formula_id = f.formula_id
                     WHERE sl.herb_item_id = ?
                     ORDER BY sl.event_time DESC
                     LIMIT ?
@@ -1136,7 +1141,11 @@ def get_stock_ledger():
                         s.name as supplier_name,
                         CASE
                             WHEN sl.event_type = 'PURCHASE' OR sl.event_type = 'RECEIPT' THEN pr.receipt_no
-                            WHEN sl.event_type = 'CONSUME' THEN COALESCE(c.prescription_no, '조제#' || c.compound_id)
+                            WHEN sl.event_type = 'CONSUME' THEN
+                                CASE
+                                    WHEN c.prescription_no IS NOT NULL THEN c.prescription_no || ' (' || COALESCE(f.formula_name, '직접조제') || ')'
+                                    ELSE '조제#' || c.compound_id || ' (' || COALESCE(f.formula_name, '직접조제') || ')'
+                                END
                             ELSE NULL
                         END as reference_no,
                         CASE
@@ -1150,6 +1159,7 @@ def get_stock_ledger():
                     LEFT JOIN purchase_receipts pr ON sl.reference_table = 'purchase_receipts' AND sl.reference_id = pr.receipt_id
                     LEFT JOIN compounds c ON sl.reference_table = 'compounds' AND sl.reference_id = c.compound_id
                     LEFT JOIN patients p ON c.patient_id = p.patient_id
+                    LEFT JOIN formulas f ON c.formula_id = f.formula_id
                     ORDER BY sl.event_time DESC
                     LIMIT ?
                 """, (limit,))