4131e6bf38
Enhance Graphviz dot output with status-based fill colors: - open: white background (default) - in_progress: light yellow background - blocked: light coral background - closed: light gray background with dimmed text Node labels show: ID, type, priority, title, and status. Priority is visible in the label (e.g., [bug P0]) but not color-coded to keep the visualization clean and focused on status.