Remove Legacy `events` Code from Central Query

[tim-rohrer]

📝 Summary

The events-related code was originally added to Central Query for early server-side proof-of-concept demos. These endpoints and related logic are no longer necessary and should be removed to simplify the codebase and reduce maintenance overhead.

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🔍 Tasks

• Identify all files, routes, and functions related to events.
• Remove events endpoints from the API.
• Delete any utility functions, models, or tests specific to events.
• Update documentation (README, API docs) to remove references to events.
• Ensure all remaining endpoints and tests pass after removal.

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💡 Rationale

• The events endpoints are not part of the current or planned API surface.
• Removing unused code improves maintainability and clarity for contributors.