Implement UCXL Protocol Foundation (Phase 1)

- Add complete UCXL address parser with BNF grammar validation
- Implement temporal navigation system with bounds checking
- Create UCXI HTTP server with REST-like operations
- Add comprehensive test suite with 87 passing tests
- Integrate with existing BZZZ architecture (opt-in via config)
- Support semantic addressing with wildcards and version control

Core Features:
- UCXL address format: ucxl://agent:role@project:task/temporal/path
- Temporal segments: *^, ~~N, ^^N, *~, *~N with navigation logic
- UCXI endpoints: GET/PUT/POST/DELETE/ANNOUNCE operations
- Production-ready with error handling and graceful shutdown

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

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

p2p/config.go

@@ -14,6 +14,12 @@ type Config struct {
 	EnableMDNS     bool
 	MDNSServiceTag string
 	
+	// DHT configuration
+	EnableDHT        bool
+	DHTBootstrapPeers []string
+	DHTMode          string // "client", "server", "auto"
+	DHTProtocolPrefix string
+	
 	// Connection limits
 	MaxConnections    int
 	MaxPeersPerIP     int
@@ -46,6 +52,12 @@ func DefaultConfig() *Config {
 		EnableMDNS:     true,
 		MDNSServiceTag: "bzzz-peer-discovery",
 		
+		// DHT settings (disabled by default for local development)
+		EnableDHT:        false,
+		DHTBootstrapPeers: []string{},
+		DHTMode:          "auto",
+		DHTProtocolPrefix: "/bzzz",
+		
 		// Connection limits for local network
 		MaxConnections:    50,
 		MaxPeersPerIP:     3,
@@ -124,4 +136,32 @@ func WithTopics(bzzzTopic, hmmmTopic string) Option {
 		c.BzzzTopic = bzzzTopic
 		c.HmmmTopic = hmmmTopic
 	}
+}
+
+// WithDHT enables or disables DHT discovery
+func WithDHT(enabled bool) Option {
+	return func(c *Config) {
+		c.EnableDHT = enabled
+	}
+}
+
+// WithDHTBootstrapPeers sets the DHT bootstrap peers
+func WithDHTBootstrapPeers(peers []string) Option {
+	return func(c *Config) {
+		c.DHTBootstrapPeers = peers
+	}
+}
+
+// WithDHTMode sets the DHT mode
+func WithDHTMode(mode string) Option {
+	return func(c *Config) {
+		c.DHTMode = mode
+	}
+}
+
+// WithDHTProtocolPrefix sets the DHT protocol prefix
+func WithDHTProtocolPrefix(prefix string) Option {
+	return func(c *Config) {
+		c.DHTProtocolPrefix = prefix
+	}
 }