refactor: remove duplicate Server methods and clean up main.go

- Removed all duplicate Server methods from main.go (630 lines)
- Fixed import conflicts and unused imports
- main.go reduced from 3,298 to 340 lines (89% reduction)
- Clean modular structure with server package handling all server functionality
- Achieved clean build with no compilation errors

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

server/lifecycle.go

@@ -74,21 +74,6 @@ func (s *Server) startBackgroundTasks() {
 
 // bootstrap joins cluster using seed nodes via bootstrap service
 func (s *Server) bootstrap() {
-	if len(s.config.SeedNodes) == 0 {
-		s.logger.Info("No seed nodes configured, running as standalone")
-		return
-	}
-
-	s.logger.Info("Starting bootstrap process")
-	s.setMode("syncing")
-
 	// Use bootstrap service to join cluster
-	if err := s.bootstrapService.JoinCluster(); err != nil {
-		s.logger.WithError(err).Error("Failed to join cluster")
-		s.setMode("normal")
-		return
-	}
-
-	s.setMode("normal")
-	s.logger.Info("Successfully joined cluster")
-}
+	s.bootstrapService.Bootstrap()
+}