[druid-infra]

Summary

• Add the missing Minecraft Forge 26.3 scroll family version.
• Point the installer cache reference at forge-26.3.jar.

Upstream checks

• Mojang version manifest: latest release 26.3.
• PaperMC Fill API: latest Paper version 26.3.
• Forge Maven metadata: latest Forge artifact 26.3-66.0.2.
• Spigot BuildTools latest successful build is live; repository's supported matrix currently reaches 26.3.

Validation

• git diff --cached --check passed.
• Shell/YAML structure follows the existing Forge 26.2 scroll pattern.
• Full repository validation and Go tests are blocked in this environment because go is not installed.

[druid-infra]

Error: This repo is not allowlisted for Atlantis.