[FEAT]: Add structured logging across the project and replace print() diagnostics

src/llm.py

@@ -114,11 +114,13 @@ def add_response_to_json(self, field, value):
         if ";" in value:
             parsed_value = self.handle_plural_values(value)
 
-        if field in self._json.keys():
-            self._json[field].append(parsed_value)
-        else:
-            self._json[field] = parsed_value
-
+     if field in self._json:
+    if isinstance(self._json[field], list):
+        self._json[field].append(parsed_value)
+    else:
+        self._json[field] = [self._json[field], parsed_value]
+else:
+    self._json[field] = parsed_value
         return
 
     def handle_plural_values(self, plural_value):

src/logger.py

@@ -0,0 +1,25 @@
+import logging
+
+
+def setup_logger(name: str):
+    """
+    Sets up and returns a logger with the given name.
+    Avoids adding duplicate handlers if logger already exists.
+    """
+    logger = logging.getLogger(name)
+
+    if logger.handlers:
+        return logger
+
+    logger.setLevel(logging.INFO)
+
+    handler = logging.StreamHandler()
+
+    formatter = logging.Formatter(
+        "%(asctime)s | %(levelname)s | %(name)s | %(message)s",
+        datefmt="%Y-%m-%d %H:%M:%S"
+    )
+    handler.setFormatter(formatter)
+    logger.addHandler(handler)
+
+    return logger