Add optional OpenTelemetry Netty server instrumentation

- Update lys.version to 2026.04.14

- Add optional compileOnly dependency on opentelemetry-netty-4.1 in rbcs-server

- Add runtime guard to only activate instrumentation when OTel classes are on classpath

- Insert OTel combined handler after HttpServerCodec in the Netty pipeline

- Add requires-static JPMS directives for optional module support

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/AbstractBasicAuthServerTest.kt

@@ -32,6 +32,7 @@ abstract class AbstractBasicAuthServerTest : AbstractServerTest() {
     override fun setUp() {
         this.cacheDir = testDir.resolve("cache")
         cfg = Configuration.of(
+            false,
             "127.0.0.1",
             getFreePort(),
             false,

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/AbstractTlsServerTest.kt

@@ -140,11 +140,11 @@ abstract class AbstractTlsServerTest : AbstractServerTest() {
         cfg = Configuration(
             "127.0.0.1",
             getFreePort(),
+            serverPath,
             false,
             emptyList(),
-
+            false,
             100,
-            serverPath,
             Configuration.EventExecutor(false),
             Configuration.RateLimiter(true, 0x100000, 50),
             Configuration.Connection(

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/NoAuthServerTest.kt

@@ -34,10 +34,11 @@ class NoAuthServerTest : AbstractServerTest() {
         cfg = Configuration(
             "127.0.0.1",
             getFreePort(),
+            serverPath,
             false,
             emptyList(),
+            false,
             100,
-            serverPath,
             Configuration.EventExecutor(false),
             Configuration.RateLimiter(true, 0x100000, 50),
             Configuration.Connection(

rbcs-server/src/test/resources/net/woggioni/rbcs/server/test/valid/rbcs-default.xml

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <rbcs:server xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
              xmlns:rbcs="urn:net.woggioni.rbcs.server"
-             xs:schemaLocation="urn:net.woggioni.rbcs.server jpms://net.woggioni.rbcs.server/net/woggioni/rbcs/server/schema/rbcs-server.xsd">
+             xs:schemaLocation="urn:net.woggioni.rbcs.server jpms://net.woggioni.rbcs.server/net/woggioni/rbcs/server/schema/rbcs-server.xsd"
+             enable-telemetry="true" path="/my/custom/path">
     <bind host="127.0.0.1" port="11443" incoming-connections-backlog-size="22" proxy-protocol="true">
         <trusted-proxies>
             <allow cidr="192.168.0.11/32"/>