Fix Security Issue: Implement JSON Deserialization Depth Limit (CVE-2024-21907)

[yuseok-kim-edushare]

This PR created to Close #64

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Summary

This PR addresses a high-severity security vulnerability (CVE-2024-21907/GHSA-5crp-9r3c-p9vr) in Newtonsoft.Json that could lead to Denial of Service attacks through excessively nested JSON payloads.

Changes

• Added a recommended MaxDepth=128 limit to JsonSerializerSettings to prevent JSON deserialization attacks
• Added CheckAdditionalContent=true for extra security validation
• Updated assembly version from 2.3.6.1 to 2.3.6.2 to track this security fix
• • API_Consumer/Consumers/Helper.cs

Security Impact

This change mitigates a Denial of Service vulnerability where maliciously crafted JSON with excessive nesting could cause:

• High CPU and memory consumption
• Thread exhaustion
• Potential StackOverflowException

References

• GitHub Advisory: GHSA-5crp-9r3c-p9vr