[mrz1836]

What Changed

• Removed six deprecated GoFortress reusable workflow files (fortress-completion-finalize.yml, fortress-completion-statistics.yml, fortress-completion-tests.yml, fortress-performance-summary.yml, fortress-test-magex.yml, fortress-test-validation.yml)
• Removed validate-test-results composite action from .github/actions/
• Removed maintainer comment (@mrz1836) from .github/.yamlfmt configuration header
• Added test fixture exclusion to yamlfmt configuration for .github/ci-tester/fixtures/workflow-invalid/.github/workflows/invalid.yml
• Updated CODEOWNERS to remove ownership entries for .github/.env.base and .github/.env.custom, changed .github/.gitleaks.toml to .gitleaksignore
• Removed load-env, setup-goreleaser, and setup-magex composite actions from .github/actions/
• Removed environment configuration files from .github/env/ directory (10-mage-x.env, 10-coverage.env, 10-pre-commit.env)
• Updated remaining workflow files to add permissions: contents: read to various jobs and remove references to deleted actions and workflows

Why It Was Necessary

• Cleanup of deprecated GoFortress testing infrastructure that is no longer used in the current CI/CD pipeline
• Removal of obsolete composite actions and environment configuration files to reduce maintenance overhead
• CODEOWNERS updates to reflect actual repository structure after removing deprecated .env files and updating gitleaks configuration location

Testing Performed

• Verified that remaining workflow files have valid syntax after removing references to deleted actions
• Confirmed yamlfmt configuration correctly excludes test fixtures from formatting checks
• Validated that CODEOWNERS file paths align with current repository structure

Impact / Risk

• Breaking Change: None - removed workflows and actions were already deprecated and unused
• Risk: Low - deletion of unused CI infrastructure should not affect active workflows
• Performance: Slightly improved repository maintenance by removing ~382+ lines of unused workflow code