Amazon SSM Agent - Release 3.3.5226.0 - 2026-08-20

• Add bounds check for HeaderLength in AgentMessage Deserialize
• Bump github.com/go-git/go-git/v5 to v5.19.2
• Bump golang.org/x/sync to v0.21.0
• Detect Azure Linux and potential future unregistered Linux platforms
• Fix Windows session command parsing by removing shlex
• Fix shell injection in Windows domainjoin plugin parameters
• Prevent control channel deadlock on ProcessorBufferFull
• Revert migration from aws-sdk-go v1 to aws-sdk-go-v2 change
• Update the logic for loading RegistrationInfo
• Upgrade Go version to 1.25.13