Initial commit: RouteWatch BGP stream monitor

- Connects to RIPE RIS Live stream to receive real-time BGP updates
- Stores BGP data in SQLite database:
  - ASNs with first/last seen timestamps
  - Prefixes with IPv4/IPv6 classification
  - BGP announcements and withdrawals
  - AS-to-AS peering relationships from AS paths
  - Live routing table tracking active routes
- HTTP server with statistics endpoints
- Metrics tracking with go-metrics
- Custom JSON unmarshaling to handle nested AS sets in paths
- Dependency injection with uber/fx
- Pure Go implementation (no CGO)
- Includes streamdumper utility for debugging raw messages

cmd/streamdumper/main.go

@@ -0,0 +1,55 @@
+// Package main provides a utility to dump raw RIS Live stream messages to stdout
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"git.eeqj.de/sneak/routewatch/internal/metrics"
+	"git.eeqj.de/sneak/routewatch/internal/streamer"
+	"log/slog"
+)
+
+func main() {
+	// Set up logger to only show errors
+	logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
+		Level: slog.LevelError,
+	}))
+
+	// Create metrics tracker
+	metricsTracker := metrics.New()
+
+	// Create streamer
+	s := streamer.New(logger, metricsTracker)
+
+	// Register raw message handler that prints to stdout
+	s.RegisterRawHandler(func(line string) {
+		fmt.Println(line)
+	})
+
+	// Set up context with cancellation
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	// Handle signals
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-sigChan
+		log.Println("Received shutdown signal")
+		cancel()
+	}()
+
+	// Start streaming
+	if err := s.Start(); err != nil {
+		log.Fatal("Failed to start streamer:", err)
+	}
+	defer s.Stop()
+
+	// Wait for context cancellation
+	<-ctx.Done()
+}