Design a schema for a logging and analytics system to collect, store, and analyze logs and telemetry data generated by a software application or system. The system should support various types of logs, including application logs, system logs, and user activity logs, and provide insights into system performance, usage patterns, and potential issues. Consider factors such as log data sources, log formats, data retention policies, and indexing strategies in your design. Discuss how you would structure the schema to efficiently store and retrieve log data, including relevant metadata and contextual information. Additionally, address how you would perform log aggregation, parsing, and enrichment to enhance the usability and usefulness of log data for analytics purposes. Provide insights into the technologies, storage solutions, query languages, and visualization tools you would employ to implement this logging and analytics system effectively.