Optimize database batch operations with prepared statements

- Add prepared statements to all batch operations for better performance
- Fix database lock contention by properly batching operations
- Update SQLite settings for extreme performance (8GB cache, sync OFF)
- Add proper error handling for statement closing
- Update tests to properly track batch operations

internal/routewatch/app_integration_test.go

@@ -221,6 +221,64 @@ func (m *mockStore) GetPrefixDetails(prefix string) ([]database.LiveRoute, error
 	return []database.LiveRoute{}, nil
 }
 
+// UpsertLiveRouteBatch mock implementation
+func (m *mockStore) UpsertLiveRouteBatch(routes []*database.LiveRoute) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	for _, route := range routes {
+		// Track prefix
+		if _, exists := m.Prefixes[route.Prefix]; !exists {
+			m.Prefixes[route.Prefix] = &database.Prefix{
+				ID:        uuid.New(),
+				Prefix:    route.Prefix,
+				IPVersion: route.IPVersion,
+				FirstSeen: route.LastUpdated,
+				LastSeen:  route.LastUpdated,
+			}
+			m.PrefixCount++
+			if route.IPVersion == 4 {
+				m.IPv4Prefixes++
+			} else {
+				m.IPv6Prefixes++
+			}
+		}
+		m.RouteCount++
+	}
+	return nil
+}
+
+// DeleteLiveRouteBatch mock implementation
+func (m *mockStore) DeleteLiveRouteBatch(deletions []database.LiveRouteDeletion) error {
+	// Simple mock - just return nil
+	return nil
+}
+
+// GetOrCreateASNBatch mock implementation
+func (m *mockStore) GetOrCreateASNBatch(asns map[int]time.Time) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	for number, timestamp := range asns {
+		if _, exists := m.ASNs[number]; !exists {
+			m.ASNs[number] = &database.ASN{
+				ID:        uuid.New(),
+				Number:    number,
+				FirstSeen: timestamp,
+				LastSeen:  timestamp,
+			}
+			m.ASNCount++
+		}
+	}
+	return nil
+}
+
+// UpdatePeerBatch mock implementation
+func (m *mockStore) UpdatePeerBatch(peers map[string]database.PeerUpdate) error {
+	// Simple mock - just return nil
+	return nil
+}
+
 func TestRouteWatchLiveFeed(t *testing.T) {
 
 	// Create mock database