feat(srv6)!: replace openlines query with tiny/full node-info API

- routing-protocol JSON API: nodeinfotinyreq/resp returns device name
  only and is never gated; nodeinfofullreq/resp returns external
  endpoints + device name + description, where denyExternalEndpointQuery
  hides only the endpoint list (name/description always answer);
  legacy openlines* wire types removed - upgrade the whole mesh together
- rename misnamed openConnections -> externalEndpoints and
  denyConnection{Query,Broadcast} -> denyExternalEndpoint{Query,Broadcast};
  legacy config keys normalized on load because gson-2.1 lacks
  @SerializedName(alternate=...)
- remove TCP-based KLALBRemoteManagement, superseded by the HTTP API
- dashboard settings follow the renamed keys; update AGENTS.md

klalb-config.json

@@ -10,7 +10,7 @@
     "TCPListen": "tcp://0.0.0.0:4565",
     "UDPListen": "udp://0.0.0.0:4572",
     "VirtualSocketName": "kltp",
-    "openConnections": [
+    "externalEndpoints": [
       "tcp://kne03.yoyo250.fun:4565",
       "tcp://kne04.yoyo250.fun:4565",
       "tcp://07f4acdef99b.ofalias.net:4565",
@@ -41,8 +41,8 @@
       "ntp://us.ntp.org.cn"
     ],
     "ExtraRoutes": [],
-    "denyConnectionQuery": false,
-    "denyConnectionBroadcast": false,
+    "denyExternalEndpointQuery": false,
+    "denyExternalEndpointBroadcast": false,
     "congestionAlgorithm": "BBR",
     "burstLimit": 2.0,
     "delayUpperBound": 1.2,