🟢 MEDIUM: Create profile-specific configurations

[GitAddRemote]

Problem

Single application.yml for all environments

Solution

Create profile-specific configs:

• application-dev.yml (ddl-auto: update, verbose logging)
• application-prod.yml (ddl-auto: validate, minimal logging)
• application-test.yml (embedded services)

Acceptance Criteria

• application-dev.yml created
• application-prod.yml created
• application-test.yml created
• Production requires JWT_SECRET to be set
• Documentation updated

Priority

🟢 Medium - Important for operational flexibility