Code - improving unique key fix for history database handler (#2402)

* improving unique key fix

* also bump timestamp along 1 sec

changedetectionio/model/Watch.py

@@ -333,7 +333,9 @@ class model(dict):
         # Small hack so that we sleep just enough to allow 1 second  between history snapshots
         # this is because history.txt indexes/keys snapshots by epoch seconds and we dont want dupe keys
         if self.__newest_history_key and int(timestamp) == int(self.__newest_history_key):
-            time.sleep(timestamp - self.__newest_history_key)
+            logger.warning(f"Timestamp {timestamp} already exists, waiting 1 seconds so we have a unique key in history.txt")
+            timestamp = str(int(timestamp) + 1)
+            time.sleep(1)
 
         threshold = int(os.getenv('SNAPSHOT_BROTLI_COMPRESSION_THRESHOLD', 1024))
         skip_brotli = strtobool(os.getenv('DISABLE_BROTLI_TEXT_SNAPSHOT', 'False'))

changedetectionio/tests/test_notification_errors.py

@@ -9,9 +9,6 @@ def test_check_notification_error_handling(client, live_server):
     live_server_setup(live_server)
     set_original_response()
 
-    # Give the endpoint time to spin up
-    time.sleep(1)
-
     # Set a URL and fetch it, then set a notification URL which is going to give errors
     test_url = url_for('test_endpoint', _external=True)
     res = client.post(