pull_request_template.md

Description

• What changed?
• Why was this change needed?

Closes

Closes #XX

Related

Relates to #YY

Checklist

• Code follows project conventions in CONTRIBUTING.md
• Self-review completed
• Tests added/updated where needed
• Documentation updated where needed

Testing

Steps to verify the change:

# Example
cd backend
mvn test

Additional checks (if applicable):

cd blockchain
npm test