fix: skip seeds when running in production environment

[rewritten]

Summary

• Adds an early-exit guard to db/seeds.rb so seeds are never loaded when RAILS_ENV=production
• Fixes the issue where bundle exec rails db:setup in Docker would unconditionally load development/demo data into production databases

Closes #828

Test plan

• Run RAILS_ENV=production rails db:setup and confirm the seed data is not loaded
• Run RAILS_ENV=development rails db:setup and confirm seeds still load normally

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds a guard to prevent seed data from being loaded when running Rails in a production environment, addressing Docker-based db:setup runs that were unintentionally populating production databases with development/demo data (Closes #828).

Changes:

• Introduces an early production-environment check in db/seeds.rb to skip seeding when Rails.env.production?.

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