fix improper generator use

utils/reader.py

@@ -21,7 +21,7 @@ class LogFileReader:
         self._last_line_number = 0
         log.debug("%s created with path %s", self.__class__.__name__, str(file_path))
 
-    async def read(self):
+    async def read(self) -> list[str]:
         if not self.file_path.exists():
             log.error("Cannot read non-existant file path: '%s'", self.file_path)
             raise FileNotFoundError(self.file_path)
@@ -30,17 +30,13 @@ class LogFileReader:
             if self._last_line_number == 0:
                 await file.seek(0, 2)
                 self._last_line_number = await file.tell()
-                return
+                return []
 
             await file.seek(self._last_line_number)
             lines = await file.readlines()
             if not lines:
                 log.debug("no new lines to read")
-                return
+                return []
 
             self._last_line_number = await file.tell()
-
-            log.debug("lines to yield: %s", len(lines))
-            for line in lines:
-                yield line.strip()
-
+            return lines