confd: extend infix-system with service runtime statistics

Add statistics container to service model with memory usage, uptime,
and restart count tracking.

Updates YANG revision to 2025-12-02.

Signed-off-by: Richard Alpe <richard@bit42.se>

src/confd/yang/confd.inc

@@ -38,7 +38,7 @@ MODULES=(
 	"infix-firewall-services@2025-04-26.yang"
 	"infix-firewall-icmp-types@2025-04-26.yang"
 	"infix-meta@2025-12-10.yang"
-	"infix-system@2025-10-18.yang"
+	"infix-system@2025-12-02.yang"
 	"infix-services@2025-12-10.yang"
 	"ieee802-ethernet-interface@2019-06-21.yang"
 	"infix-ethernet-interface@2024-02-27.yang"

src/confd/yang/confd/infix-system.yang

@@ -28,6 +28,11 @@ module infix-system {
   contact      "kernelkit@googlegroups.com";
   description  "Infix augments and deviations to ietf-system.";
 
+  revision 2025-12-02 {
+    description "Extend services with runtime statistics:
+                   - Add statistics container with memory-usage, uptime, restart-count";
+    reference "internal";
+  }
   revision 2025-10-18 {
     description "New system-state status:
                    - Add system resource usage: memory, loadavg, filesystem usage
@@ -508,6 +513,28 @@ module infix-system {
           description
             "Detailed current status of the process.";
         }
+
+        container statistics {
+          description "Service resource usage and runtime statistics";
+          config false;
+
+          leaf memory-usage {
+            type uint64;
+            units "bytes";
+            description "Current memory usage in bytes";
+          }
+
+          leaf uptime {
+            type uint64;
+            units "seconds";
+            description "Time service has been running";
+          }
+
+          leaf restart-count {
+            type uint32;
+            description "Number of service restarts";
+          }
+        }
       }
     }