feat: update values.yaml and refactor cleanup paths

- Changed project name in values.yaml from "sientia-dataops-model-manager" to "sientia-model-manager".
- Added new environment variables for GitHub repository and branch configuration.
- Refactored cleanup paths to use a centralized REPORTS_TEMP_DIR constant for consistency.
- Updated runtime configurations and adjusted volume mounts for better resource management.
- Enabled SSH access for the model manager and disabled Grafana dashboard creation.
- Updated tests to reflect changes in directory paths and environment variable usage.

model_manager/activities/cleanup.py

@@ -23,6 +23,7 @@ with workflow.unsafe.imports_passed_through():
     from sientia_do.observability.sientia_monitoring import SientiaMonitoring
 
     from model_manager.metrics import ACTIVITY_EXECUTION_TOTAL, WORKFLOW_EXECUTION_TOTAL
+    from model_manager.runtime_paths import REPORTS_TEMP_DIR
 
     RETENTION_HOURS = int(os.getenv('CLEANUP_RETENTION_HOURS', '24'))
     DRY_RUN = os.getenv('CLEANUP_DRY_RUN', 'false').lower() == 'true'
@@ -82,7 +83,7 @@ class Cleanup(SientiaMonitoring):
             Exception: If cleanup fails (after sending notification)
         """
         metadata = input_data.get('metadata', {})
-        temp_path = input_data.get('temp_path', 'model_manager/reports/temp')
+        temp_path = input_data.get('temp_path', REPORTS_TEMP_DIR)
         metrics_status = 'success'
 
         cutoff_time = datetime.now() - timedelta(hours=self.retention_hours)