chore: release v4.1.0

[jaime-iobermudez]

Description:

This pull request introduces significant improvements to the build and test process for the contracts, as well as optimizations to the Dockerfile for the backend service. The main changes include a complete refactor of the GitHub Actions workflow for contracts, a more robust and efficient Docker build process, and the removal of the public security policy file.

CI/CD Workflow Improvements:

• Refactored .github/workflows/test-contracts.yaml to use a multi-stage, cache-optimized workflow:
  • Introduced separate jobs for building, testing, and coverage, with artifact and dependency caching to speed up subsequent jobs.
  • Switched contract tests to run on the Hiero Solo Network with dynamic account creation, improved Docker checks, and more robust resource cleanup.
  • Updated Node.js version to 22 and modernized GitHub Action versions and steps.

Backend Dockerfile Optimizations:

• Updated the backend/Dockerfile for both development and production:
  • Now copies only necessary files at each stage, installs all workspace dependencies before copying backend source, and uses appropriate working directories for build and runtime.
  • In production, ensures only the built backend output and production dependencies are included, reducing image size and improving build reliability. [1] [2] [3]

Security Policy:

• Removed the SECURITY.md file, eliminating the public documentation for vulnerability reporting via email.

Related issue(s):

Fixes #

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[swirlds-automation]

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