Add full Oculog codebase

server/backend/db/migration_add_disks.sql

@@ -0,0 +1,8 @@
+-- Migration: Add disks column to metrics table
+-- This allows storing multiple disk metrics as JSON
+
+ALTER TABLE metrics ADD COLUMN IF NOT EXISTS disks JSONB;
+
+-- Create index on disks column for better query performance
+CREATE INDEX IF NOT EXISTS idx_metrics_disks ON metrics USING GIN (disks);
+