feat: add useful error message for when the store manager cant be initialized

Refs: OPS-83

senju/store_manager.py

@@ -12,13 +12,25 @@ from senju.haiku import Haiku
 DEFAULT_DB_PATH: Path = Path("/var/lib/senju.json")
 
 
+class BadStoreManagerFileError(Exception):
+    def __init__(self, msg: str, * args: object) -> None:
+        self.msg = msg
+        super().__init__(*args)
+
+    def __str__(self) -> str:
+        return f"Store file is corrupted: {self.msg}"
+
+
 class StoreManager:
     __slots__ = "_db", "logger"
     _db: TinyDB
     logger: Logger
 
     def __init__(self, path_to_db: Path = DEFAULT_DB_PATH) -> None:
+        try:
             self._db = TinyDB(path_to_db)
+        except Exception as e:
+            raise BadStoreManagerFileError(f"{e}")
         self.logger = Logger(__name__)
 
     def _query(self, query: QueryImpl) -> list[dict]: