SIENTIAPDE-1084

Remove deprecated files and enhance documentation

- Deleted `coverage.sh`, `docker-compose.yaml`, `Dockerfile`, and simulator-related files to streamline the project structure.
- Updated `README.md` to provide a comprehensive overview of the OPC Ingestor, including features, architecture, installation, usage, and troubleshooting.
- Enhanced docstrings across various classes and methods in the `ingestor` module for better clarity and maintainability.
- Improved Prometheus metrics documentation in `metrics.py` to ensure proper monitoring and observability of the system.

ingestor/metrics.py

@@ -1,5 +1,22 @@
+"""
+Prometheus metrics configuration for the OPC Ingestor application.
+
+This module defines all the metrics used for monitoring and observability
+of the OPC Ingestor system. It includes metrics for:
+
+- Application health and performance
+- OPC server connections and subscriptions
+- Data processing and storage operations
+- Resource management and load balancing
+- Error tracking and notification systems
+
+All metrics follow Prometheus naming conventions and include appropriate
+labels for multi-dimensional analysis and alerting.
+"""
+
 from prometheus_client import Counter, Gauge, Histogram
 
+# Metric label definitions for consistent labeling across all metrics
 POD_ID_LABEL = ["pod_id"]
 SERVER_LABELS = ["pod_id", "server_name", "server_url"]
 KAFKA_LABELS = ["pod_id", "topic"]
@@ -15,7 +32,6 @@ TAG_WRITTEN_COUNT = Counter(
     [*MAIN_LABELS, "tag_name", "collection_name"],
 )
 
-
 # --- General Application Metrics ---
 APP_LOOP_COUNT = Counter(
     "app_main_loop_total",