feat: add foreign key constraints and metrics for blockchain node

apps/wallet-daemon/src/app/deps.py

@@ -5,6 +5,7 @@ from functools import lru_cache
 from fastapi import Depends
 
 from .keystore.service import KeystoreService
+from .ledger_mock import SQLiteLedgerAdapter
 from .receipts.service import ReceiptVerifierService
 from .settings import Settings, settings
 
@@ -24,3 +25,8 @@ def get_receipt_service(config: Settings = Depends(get_settings)) -> ReceiptVeri
 @lru_cache
 def get_keystore() -> KeystoreService:
     return KeystoreService()
+
+
+@lru_cache
+def get_ledger(config: Settings = Depends(get_settings)) -> SQLiteLedgerAdapter:
+    return SQLiteLedgerAdapter(config.ledger_db_path)