ops: add summary and auth failure views

docs/server-management.md

@@ -32,10 +32,12 @@ The Debian deployment installs:
 
 `metinctl` is a lightweight operational CLI for:
 
+- showing an operational summary
 - viewing inventory
 - listing managed units
 - checking service status
 - listing declared ports
+- listing recent auth failures
 - restarting the whole stack or specific channels/instances
 - viewing logs
 - listing core files in the runtime tree
@@ -57,12 +59,30 @@ Show current unit state:
 metinctl status
 ```
 
+Show a quick operational summary:
+
+```bash
+metinctl summary
+```
+
 Show declared ports and whether they are currently listening:
 
 ```bash
 metinctl ports --live
 ```
 
+Show recent real auth failures and skip smoke-test logins:
+
+```bash
+metinctl auth-failures
+```
+
+Include smoke-test failures too:
+
+```bash
+metinctl auth-failures --include-smoke
+```
+
 Restart only channel 1 cores:
 
 ```bash