Migrate entity data to JSON to prevent code injection

[Natuworkguy]

Summary

Update all entity data handling in ABS-Engine to use JSON serialization and deserialization instead of native Python dicts.

Motivation

• Using Python dicts for entity data can lead to code injection vulnerabilities, such as function or f-string injection, if any untrusted data is introduced.
• JSON provides a safe, restricted format for data and prevents accidental execution of code.

Tasks

• Identify all current locations where entity data is stored, loaded, or manipulated as Python dicts.
• Refactor the code to store and retrieve entity data in JSON format.
• Ensure all imports, exports, and intermediate handling of entity data are JSON-based.
• Add checks to reject non-JSON-conforming input.
• Test thoroughly to ensure no regressions and that all systems process JSON entity data correctly.

Impact

This is a significant update that improves the engine's security and robustness.

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This change will prevent serious code injection issues and aligns with best security practices.