SIENTIAPDE-1312

Update image tag in values.yaml and refactor OpcManager error handling

- Updated the image tag in values.yaml from "0.4.5" to "0.4.9" for the latest version.
- Refactored error handling in OpcManager to improve logging and maintain code clarity.
- Adjusted unit tests for better readability and consistency in assertions.

ingestor/managers/opc_manager.py

@@ -1,7 +1,7 @@
 import asyncio
 import json
-from pathlib import Path
 import traceback
+from pathlib import Path
 
 from asyncua import Client
 from asyncua.crypto.security_policies import SecurityPolicyBasic256
@@ -86,7 +86,6 @@ class OpcManager(BaseActivity):
         self.data_manager = data_manager
         self.metadata = metadata
 
-
         BaseActivity.__init__(
             self, logger=logger, notification_handler=notification_handler, set_error_counter=True
         )
@@ -209,7 +208,7 @@ class OpcManager(BaseActivity):
                 pod_id=self.pod_id, server_name=self.name, server_url=self.url
             ).set(1)
             self.logger.info(f'Connection to {self.name} successful.')
-        except Exception as e:
+        except Exception:
             await self.disconnect()
 
             raise
@@ -239,7 +238,8 @@ class OpcManager(BaseActivity):
             raise ValueError('Client not connected. Call connect first.')
         try:
             self.subscriptions[name] = await self.client.create_subscription(
-                self.subscription_period_ms, self)
+                self.subscription_period_ms, self
+            )
             self.logger.info(f'Subscription {name} created on {self.name}.')
             metrics.OPC_SUBSCRIPTIONS_CREATED.labels(
                 pod_id=self.pod_id, server_name=self.name, slot_name=name
@@ -332,16 +332,20 @@ class OpcManager(BaseActivity):
         error_stack = []
         for i in range(5):
             try:
-                self.logger.info(f'Disconnecting from OPC UA server, attempt {i+1} of 5')
+                self.logger.info(f'Disconnecting from OPC UA server, attempt {i + 1} of 5')
                 await self.client.disconnect()
                 return []
             except Exception as e:
-                self.logger.error(f'Failed to disconnect from OPC UA serve  in attempt {i+1} of 5: {e}')
-                error_stack.append({
-                    'attempt': i+1,
-                    'error': str(e),
-                    'traceback': traceback.format_exc(),
-                })
+                self.logger.error(
+                    f'Failed to disconnect from OPC UA serve  in attempt {i + 1} of 5: {e}'
+                )
+                error_stack.append(
+                    {
+                        'attempt': i + 1,
+                        'error': str(e),
+                        'traceback': traceback.format_exc(),
+                    }
+                )
                 await asyncio.sleep(0.1 * i)
         return error_stack
 
@@ -375,7 +379,6 @@ class OpcManager(BaseActivity):
         except Exception as sub_error:
             self.logger.error(f'Failed to clean up subscription: {sub_error}')
 
-        
         errors = await self.disconnection_fallback()
 
         if errors: