SIENTIAPDE-988

Add temporary functiontal tests, that must be removed soon.

Refactor tests: Remove outdated resource manager tests and add functional tests with Docker and Kafka integration

- Deleted existing unit tests for ResourceManager.
- Introduced new functional tests for single node operations with Redis and Kafka.
- Added Docker Compose setup for test environment.
- Implemented fixtures for Redis and Kafka consumers.
- Created comprehensive tests for data publishing and slot management.
- Added unit tests for DataManager and IngestorManager with mocked dependencies.
- Included tests for OpcManager covering connection, subscription, and data change notifications.

ingestor/managers/resource_manager.py

@@ -106,3 +106,14 @@ class ResourceManager:
         """
 
         return self.redis.keys("heartbeat:ingestor:*")
+
+    def get_all_slots(self) -> List[str]:
+        """
+        Retrieves the number of slots available in Redis.
+        This method counts the number of keys in Redis that match the pattern for OPC tag leases
+        and returns the count.
+        Returns:
+            int: The number of slots available.
+        """
+
+        return self.redis.keys("slot:opc_tags:*")