Fix RQLite join address for regular nodes

- Regular nodes now join actual bootstrap nodes instead of localhost:4001
- Extract IP from bootstrap peer multiaddrs for RQLite join address
- Add fallback to first known bootstrap node (57.129.81.31:4001)
- This fixes the 'fatal: http://localhost:4001 is an invalid join address' error

Regular nodes will now properly join the RQLite cluster of bootstrap nodes
instead of trying to join themselves, which was causing startup failures.

cmd/node/main.go

@@ -88,24 +88,40 @@ func main() {
 		cfg.Database.RQLiteJoinAddress = ""
 		logger.Printf("Bootstrap node - starting new RQLite cluster")
 	} else {
-		// Regular nodes join the bootstrap node's RQLite cluster
-		cfg.Database.RQLiteJoinAddress = "http://localhost:4001"
-
 		// Configure bootstrap peers for P2P discovery
+		var rqliteJoinAddr string
 		if *bootstrap != "" {
 			// Use command line bootstrap if provided
 			cfg.Discovery.BootstrapPeers = []string{*bootstrap}
+			// Extract IP from bootstrap peer for RQLite join
+			bootstrapHost := parseHostFromMultiaddr(*bootstrap)
+			if bootstrapHost != "" {
+				rqliteJoinAddr = fmt.Sprintf("http://%s:4001", bootstrapHost)
+			} else {
+				rqliteJoinAddr = "http://57.129.81.31:4001" // Default fallback
+			}
 			logger.Printf("Using command line bootstrap peer: %s", *bootstrap)
 		} else {
 			// Use environment-configured bootstrap peers
 			bootstrapPeers := constants.GetBootstrapPeers()
 			if len(bootstrapPeers) > 0 {
 				cfg.Discovery.BootstrapPeers = bootstrapPeers
+				// Use the first bootstrap peer for RQLite join
+				bootstrapHost := parseHostFromMultiaddr(bootstrapPeers[0])
+				if bootstrapHost != "" {
+					rqliteJoinAddr = fmt.Sprintf("http://%s:4001", bootstrapHost)
+				} else {
+					rqliteJoinAddr = "http://57.129.81.31:4001" // Default fallback
+				}
 				logger.Printf("Using environment bootstrap peers: %v", bootstrapPeers)
 			} else {
 				logger.Printf("Warning: No bootstrap peers configured")
+				rqliteJoinAddr = "http://57.129.81.31:4001" // Default fallback
 			}
 		}
+		
+		// Regular nodes join the bootstrap node's RQLite cluster
+		cfg.Database.RQLiteJoinAddress = rqliteJoinAddr
 		logger.Printf("Regular node - joining RQLite cluster at: %s", cfg.Database.RQLiteJoinAddress)
 	}