v0.15.9

v0.15.9 — Dashboard Enhancements: Annotations, Time Picker, Log Stream

New

• 🗑️ Removed old backup dashboard file
• 🔧 Fixed Nemo iframe URL placeholder
• 🔴 Probe Dropout annotations (30-day view)
• 🟠 ±4σ Anomaly annotations (30-day view)
• 🔵 Tank Events annotations (30-day view)
• 📅 Custom time picker with 30d/90d presets
• 📋 Log Viewer converted to stable log stream panel with custom date format
• 🧹 Cleaned up duplicate dashboards in Grafana