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/database/interface.go

@@ -2,8 +2,6 @@ package database
 
 import (
 	"time"
-
-	"github.com/google/uuid"
 )
 
 // Stats contains database statistics
@@ -13,7 +11,6 @@ type Stats struct {
 	IPv4Prefixes int
 	IPv6Prefixes int
 	Peerings     int
-	LiveRoutes   int
 }
 
 // Store defines the interface for database operations
@@ -30,11 +27,6 @@ type Store interface {
 	// Peering operations
 	RecordPeering(fromASNID, toASNID string, timestamp time.Time) error
 
-	// Live route operations
-	UpdateLiveRoute(prefixID, originASNID uuid.UUID, peerASN int, nextHop string, timestamp time.Time) error
-	WithdrawLiveRoute(prefixID uuid.UUID, peerASN int, timestamp time.Time) error
-	GetActiveLiveRoutes() ([]LiveRoute, error)
-
 	// Statistics
 	GetStats() (Stats, error)