SIENTIAPDE-1318

Refactor project structure and update configurations

- Deleted the empty `__init__.py` file to clean up the project structure.
- Renamed the project from "laborious" to "ingestor" in `pyproject.toml`, updating the description accordingly.
- Improved type hints and conditional checks in the `Ingestor`, `DataManager`, `IngestorManager`, and `OpcManager` classes for better code clarity and type safety.
- Enhanced error handling and assertions in various methods to ensure robustness.
- Updated unit tests to reflect changes in class names and error handling improvements.

ingestor/managers/data_manager.py

@@ -129,7 +129,7 @@ class DataManager(BaseActivity):
         self.connection_string = mongo_connection_string
         self.database = mongo_database
 
-        self.mongo_client = MongoClient(self.connection_string)
+        self.mongo_client: MongoClient = MongoClient(self.connection_string)
         self.mongo_client.server_info()
 
         self.metadata = metadata
@@ -176,7 +176,7 @@ class DataManager(BaseActivity):
     def __del__(self):
         self.shutdown()
 
-    def delivery_report(self, msg: str):
+    def delivery_report(self, msg):
         """
         Callback for successful Kafka message delivery reports.
 
@@ -191,7 +191,7 @@ class DataManager(BaseActivity):
             f'Record successfully produced to {msg.topic} [{msg.partition}] at offset {msg.offset}'
         )
 
-    def delivery_error(self, err: str):
+    def delivery_error(self, err):
         """
         Callback for Kafka message delivery error reports.
 
@@ -218,7 +218,7 @@ class DataManager(BaseActivity):
             Exception: If there is an error during message delivery, it will be handled by the `delivery_error` callback.
         """
 
-        if self.export_to_kafka:
+        if self.export_to_kafka and self.kafka_producer:
             try:
                 self.logger.debug(f'Publishing message to topic {topic}: {data}')
                 self.kafka_producer.send(topic=topic, value=data).add_callback(