Add database file size and reorganize status page

- Add database file size tracking to Stats struct and GetStats()
- Move routing table metrics to separate 'Routing Table' status box
- Add IPv4/IPv6 updates per second to routing table metrics
- Database box now shows: ASNs, prefixes, peerings, and database size
- Routing table box shows: live routes, IPv4/IPv6 counts, and update rates

internal/database/database.go

@@ -25,6 +25,7 @@ const dirPermissions = 0750 // rwxr-x---
 type Database struct {
 	db     *sql.DB
 	logger *slog.Logger
+	path   string
 }
 
 // Config holds database configuration
@@ -112,7 +113,7 @@ func NewWithConfig(config Config, logger *slog.Logger) (*Database, error) {
 	db.SetMaxIdleConns(1)
 	db.SetConnMaxLifetime(0)
 
-	database := &Database{db: db, logger: logger}
+	database := &Database{db: db, logger: logger, path: config.Path}
 
 	if err := database.Initialize(); err != nil {
 		return nil, fmt.Errorf("failed to initialize database: %w", err)
@@ -437,6 +438,16 @@ func (d *Database) GetStats() (Stats, error) {
 		return stats, err
 	}
 
+	// Get database file size
+	d.logger.Info("Getting database file size")
+	fileInfo, err := os.Stat(d.path)
+	if err != nil {
+		d.logger.Warn("Failed to get database file size", "error", err)
+		stats.FileSizeBytes = 0
+	} else {
+		stats.FileSizeBytes = fileInfo.Size()
+	}
+
 	d.logger.Info("Stats collection complete")
 
 	return stats, nil

internal/database/interface.go

@@ -6,11 +6,12 @@ import (
 
 // Stats contains database statistics
 type Stats struct {
-	ASNs         int
-	Prefixes     int
-	IPv4Prefixes int
-	IPv6Prefixes int
-	Peerings     int
+	ASNs          int
+	Prefixes      int
+	IPv4Prefixes  int
+	IPv6Prefixes  int
+	Peerings      int
+	FileSizeBytes int64
 }
 
 // Store defines the interface for database operations