Fix Bug from GitHub Issue

Systematic workflow for turning a GitHub issue into a working fix in the DBHub codebase.

Workflow

1. Fetch → 2. Analyze → 3. Locate → 4. Reproduce → 5. Plan → 6. Implement → 7. Verify → 8. PR

Step 1: Fetch Issue

# From URL: https://github.com/owner/repo/issues/123
gh issue view 123 --json title,body,labels,comments,state

# From another repo
gh issue view 123 --repo owner/repo --json title,body,labels,comments,state