Change environment variable from REFORGE_SDK_KEY to REFORGE_BACKEND_SDK_KEY

[jkebinger]

Summary

• Renamed environment variable from REFORGE_SDK_KEY to REFORGE_BACKEND_SDK_KEY for improved clarity
• Updated SDK Options class to read the new environment variable name
• Updated GitHub workflows to use the new variable name
• Bumped version to 1.0.0 to indicate this breaking change

Breaking Change

⚠️ This is a breaking change. Users will need to update their environment variable from:

• Old: REFORGE_SDK_KEY
• New: REFORGE_BACKEND_SDK_KEY

Changes

• sdk/src/main/java/com/reforge/sdk/Options.java: Updated env var lookup from REFORGE_SDK_KEY to REFORGE_BACKEND_SDK_KEY
• .github/workflows/maven.yml: Updated test workflow to use new env var
• .github/workflows/publish.yml: Updated publish workflow to use new env var
• All pom.xml files: Bumped version from 0.3.27 to 1.0.0
• README files: Updated version references to 1.0.0

Test plan

• Updated GitHub workflow tests to use new environment variable name
• Verify workflows pass with new env var
• Update deployment documentation to reflect env var change

[jdwyah]

thanks