[Sync] Update project files from source repository (ead8752)

[mrz1836]

What Changed

• Updated MAGE_X_VERSION from v1.13.0 to v1.15.0
• Updated MAGE_X_GORELEASER_VERSION from v2.13.1 to v2.13.2
• Updated MAGE_X_YAMLFMT_VERSION from v0.20.0 to v0.21.0
• Added new configuration variable MAGE_X_BENCHSTAT_VERSION=v0.0.0-20251208221838-04cf7a2dca90
• Updated comments in .gitpod.yml from project-specific wording to generic wording (e.g., "go-safe-conversion development environment" to "development environment")
• Added new GitHub Actions workflow files for benchstat setup, statistics upload, fortress completion statistics, and modified existing fortress workflows
• Updated technical conventions documentation for MAGE-X integration and general README structure

Why It Was Necessary

• Upgrading MAGE-X and its toolchain dependencies (goreleaser, yamlfmt) ensures access to latest features, bug fixes, and security patches
• Adding benchstat support enables automated benchmark statistics collection and comparison capabilities
• Generalizing Gitpod comments improves reusability of configuration across different projects

Testing Performed

• Verify that MAGE-X v1.15.0 and updated tool versions are compatible with existing build processes
• Confirm that new benchstat integration works with GitHub Actions workflows
• Test that Gitpod environment initializes correctly with updated configuration and generic messaging

Impact / Risk

• Low Risk: Version updates are incremental and maintain backward compatibility within the build toolchain
• CI/CD Impact: New benchstat workflow and statistics upload actions extend CI capabilities without disrupting existing pipelines
• Developer Experience: Gitpod configuration changes are cosmetic and do not affect functionality

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[mrz1836]

LGTM!