ops: add auth activity and session views

docs/server-management.md

@@ -33,11 +33,13 @@ The Debian deployment installs:
 `metinctl` is a lightweight operational CLI for:
 
 - showing an operational summary
+- showing recent auth success/failure activity
 - viewing inventory
 - listing managed units
 - checking service status
 - listing declared ports
 - listing recent auth failures
+- listing recent login sessions
 - restarting the whole stack or specific channels/instances
 - viewing logs
 - listing core files in the runtime tree
@@ -77,12 +79,36 @@ Show recent real auth failures and skip smoke-test logins:
 metinctl auth-failures
 ```
 
+Show recent auth success/failure flow:
+
+```bash
+metinctl auth-activity
+```
+
+Show only recent auth failures including smoke tests:
+
+```bash
+metinctl auth-activity --status failure --include-smoke
+```
+
 Include smoke-test failures too:
 
 ```bash
 metinctl auth-failures --include-smoke
 ```
 
+Show recent login sessions from `log.loginlog2`:
+
+```bash
+metinctl sessions
+```
+
+Show only sessions that still have no recorded logout:
+
+```bash
+metinctl sessions --active-only
+```
+
 Restart only channel 1 cores:
 
 ```bash