Complete rewrite: SnapRAID SMART logger with BackBlaze algorithm

Fetches SMART data from Scrutiny's InfluxDB and calculates failure
probabilities using the exact BackBlaze tables from SnapRAID source.

Key features:
- Calculates both v12 (with attr 193) and v13 (without attr 193) algorithms
- v12 matches SnapRAID pre-v13.0 (includes Load Cycle Count)
- v13 matches modern SnapRAID v13.0+ (excludes Load Cycle Count)
- Stores both values for trending and comparison
- Correctly applies bit masks (16-bit for 187/188, 32-bit for others)
- Annualizes monthly rates and applies Poisson distribution
- Logs to PostgreSQL with device metadata

Solved the mystery: SnapRAID v12 uses attribute 193 which was removed
in v13.0. Load cycle count has massive impact on failure predictions
for some drives (80% vs 4% difference).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

setup_database.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+# Setup script for PostgreSQL database and user
+
+set -e  # Exit on error
+
+# Configuration
+PG_HOST="${1:-localhost}"
+PG_ADMIN_USER="postgres"
+PG_ADMIN_PASS="Lkxdjfhl1d"
+
+DB_NAME="smart_monitoring"
+DB_USER="smart_logger"
+DB_PASS="${2:-change_me_123}"  # Pass as second argument or use default
+
+echo "PostgreSQL Setup for Smart Logger"
+echo "=================================="
+echo "Host: $PG_HOST"
+echo "Database: $DB_NAME"
+echo "User: $DB_USER"
+echo ""
+
+# Check if psql is installed
+if ! command -v psql &> /dev/null; then
+    echo "ERROR: psql is not installed"
+    echo "Install with: sudo pacman -S postgresql"
+    exit 1
+fi
+
+echo "Step 1: Creating database..."
+PGPASSWORD="$PG_ADMIN_PASS" psql -h "$PG_HOST" -U "$PG_ADMIN_USER" -d postgres <<EOF
+-- Create database if it doesn't exist
+SELECT 'CREATE DATABASE $DB_NAME'
+WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = '$DB_NAME')\gexec
+
+-- Create user if doesn't exist
+DO \$\$
+BEGIN
+  IF NOT EXISTS (SELECT FROM pg_user WHERE usename = '$DB_USER') THEN
+    CREATE USER $DB_USER WITH PASSWORD '$DB_PASS';
+  END IF;
+END
+\$\$;
+
+-- Grant privileges
+GRANT ALL PRIVILEGES ON DATABASE $DB_NAME TO $DB_USER;
+EOF
+
+echo "✓ Database and user created"
+echo ""
+
+echo "Step 2: Creating schema..."
+PGPASSWORD="$PG_ADMIN_PASS" psql -h "$PG_HOST" -U "$PG_ADMIN_USER" -d "$DB_NAME" -f schema_v2.sql
+
+echo "✓ Schema created"
+echo ""
+
+echo "Step 3: Granting permissions to $DB_USER..."
+PGPASSWORD="$PG_ADMIN_PASS" psql -h "$PG_HOST" -U "$PG_ADMIN_USER" -d "$DB_NAME" <<EOF
+-- Grant schema usage
+GRANT USAGE ON SCHEMA public TO $DB_USER;
+
+-- Grant table permissions
+GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO $DB_USER;
+GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public TO $DB_USER;
+
+-- Grant default privileges for future objects
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON TABLES TO $DB_USER;
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON SEQUENCES TO $DB_USER;
+EOF
+
+echo "✓ Permissions granted"
+echo ""
+
+echo "=========================================="
+echo "Setup Complete!"
+echo "=========================================="
+echo ""
+echo "Connection details for your .env file:"
+echo ""
+echo "POSTGRES_HOST=$PG_HOST"
+echo "POSTGRES_PORT=5432"
+echo "POSTGRES_DB=$DB_NAME"
+echo "POSTGRES_USER=$DB_USER"
+echo "POSTGRES_PASSWORD=$DB_PASS"
+echo ""
+echo "Test connection with:"
+echo "psql -h $PG_HOST -U $DB_USER -d $DB_NAME"