🟢 MEDIUM: Add logback.xml with structured logging

[GitAddRemote]

Problem

No logging configuration, using Spring Boot defaults

Solution

Create logback-spring.xml with:

• JSON logging for production
• Console logging for dev
• Log file rotation (100MB, 30 days)
• Profile-specific log levels
• Correlation ID in logs

Dependencies

implementation("net.logstash.logback:logstash-logback-encoder:7.4")

Acceptance Criteria

• logback-spring.xml created
• JSON logging in production
• Log file rotation configured
• logs/ in .gitignore

Priority

🟢 Medium - Important for production operations