Create 2025-05-05-private-health-monitoring-methods.mdx

[ncrouch-cflare]

Adding Load Balancing folder and initial changelog entry for additional monitoring protocol support when targeting private IPs

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PR Change Summary

Added support for UDP and ICMP health monitoring for private load balancing endpoints.

• Introduced UDP and ICMP health monitors for private endpoints.
• Enabled ICMP ping monitors for endpoint reachability checks.
• Implemented UDP monitors for lightweight health checks on non-TCP workloads.

Added Files

• src/content/changelog/load-balancing/2025-05-05-private-health-monitoring-methods.mdx

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