Replace live_routes database table with in-memory routing table

- Remove live_routes table from SQL schema and all related indexes
- Create new internal/routingtable package with thread-safe RoutingTable
- Implement RouteKey-based indexing with secondary indexes for efficient lookups
- Add RoutingTableHandler to manage in-memory routes separately from database
- Update DatabaseHandler to only handle persistent database operations
- Wire up RoutingTable through fx dependency injection
- Update server to get live route count from routing table instead of database
- Remove LiveRoutes field from database.Stats struct
- Update tests to work with new architecture

internal/server/server.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"git.eeqj.de/sneak/routewatch/internal/database"
+	"git.eeqj.de/sneak/routewatch/internal/routingtable"
 	"git.eeqj.de/sneak/routewatch/internal/streamer"
 	"git.eeqj.de/sneak/routewatch/internal/templates"
 	"github.com/go-chi/chi/v5"
@@ -18,19 +19,21 @@ import (
 
 // Server provides HTTP endpoints for status monitoring
 type Server struct {
-	router   *chi.Mux
-	db       database.Store
-	streamer *streamer.Streamer
-	logger   *slog.Logger
-	srv      *http.Server
+	router       *chi.Mux
+	db           database.Store
+	routingTable *routingtable.RoutingTable
+	streamer     *streamer.Streamer
+	logger       *slog.Logger
+	srv          *http.Server
 }
 
 // New creates a new HTTP server
-func New(db database.Store, streamer *streamer.Streamer, logger *slog.Logger) *Server {
+func New(db database.Store, rt *routingtable.RoutingTable, streamer *streamer.Streamer, logger *slog.Logger) *Server {
 	s := &Server{
-		db:       db,
-		streamer: streamer,
-		logger:   logger,
+		db:           db,
+		routingTable: rt,
+		streamer:     streamer,
+		logger:       logger,
 	}
 
 	s.setupRoutes()
@@ -200,7 +203,7 @@ func (s *Server) handleStatusJSON() http.HandlerFunc {
 			IPv4Prefixes:   dbStats.IPv4Prefixes,
 			IPv6Prefixes:   dbStats.IPv6Prefixes,
 			Peerings:       dbStats.Peerings,
-			LiveRoutes:     dbStats.LiveRoutes,
+			LiveRoutes:     s.routingTable.Size(),
 		}
 
 		w.Header().Set("Content-Type", "application/json")
@@ -300,7 +303,7 @@ func (s *Server) handleStats() http.HandlerFunc {
 			IPv4Prefixes:   dbStats.IPv4Prefixes,
 			IPv6Prefixes:   dbStats.IPv6Prefixes,
 			Peerings:       dbStats.Peerings,
-			LiveRoutes:     dbStats.LiveRoutes,
+			LiveRoutes:     s.routingTable.Size(),
 		}
 
 		w.Header().Set("Content-Type", "application/json")