SIENTIAPDE-1478

Enhance PI Web API Scouter Workflow and Documentation

- Added support for PI Web API data ingestion, including real-time and historical data retrieval.
- Implemented timestamp normalization to ensure consistency across records.
- Updated README.md to reflect new features and detailed workflow execution flow.
- Enhanced API class with comprehensive error handling and cleanup operations.
- Improved CoreScouter workflow with early exit conditions and detailed processing steps.
- Updated configuration parameters for better clarity and usability.

scouter/workflow/scouter.py

@@ -32,10 +32,14 @@ class Scouter:
 
         This method orchestrates the complete data ingestion process:
         1. Retrieves the last processed timestamp from Redis
-        2. Loads new data from MongoDB since the last timestamp
-        3. Updates the last processed timestamp
+        2. Loads new data from MongoDB since the last timestamp using collection name
+           format: `raw_{schedule_name}`
+        3. Updates the last processed timestamp with the most recent data point
         4. Delegates data processing to the CoreScouter workflow
 
+        If no new data is found in MongoDB, the workflow exits early without updating
+        the timestamp or invoking the CoreScouter workflow.
+
         Args:
             input_data (dict[str, Any]): Configuration and parameters for the workflow execution.
                 Required fields: