fix: correct all-time hours value and update backend limit

src/postgres_history.py

@@ -21,8 +21,8 @@ class PostgresHistory:
         end: datetime.datetime,
         limit: int = 2000,
     ) -> List[Dict]:
-        if not 1 <= limit <= 5000:
-            raise ValueError("limit must be between 1 and 5000")
+        if not 1 <= limit <= 10000:
+            raise ValueError("limit must be between 1 and 10000")
         if start >= end:
             raise ValueError("start must be before end")