stats+log : am stats (agregats par agent, periodes 7d/30d/90d, barres ASCII) et am log (filtres agent/kind/date, limite) (issue #6)

src/cli.rs

@@ -112,6 +112,28 @@ pub enum Command {
         #[arg(long, value_name = "ID")]
         show: Option<String>,
     },
+    /// Show usage statistics computed from the event journal
+    Stats {
+        /// Agent name or alias (omit for the global view)
+        agent: Option<String>,
+        /// Only events of the last period (7d, 30d, 90d, all)
+        #[arg(long, value_name = "PERIOD")]
+        period: Option<String>,
+    },
+    /// Read the event journal: everything am did
+    Log {
+        /// Only events of this agent
+        agent: Option<String>,
+        /// Only these event kinds (comma separated: start,stop,run,install,...)
+        #[arg(long, value_name = "KINDS")]
+        kind: Option<String>,
+        /// Only events at or after this date (YYYY-MM-DD or RFC 3339)
+        #[arg(long, value_name = "DATE")]
+        since: Option<String>,
+        /// Maximum number of events (default: 50)
+        #[arg(long, value_name = "N", default_value = "50")]
+        limit: usize,
+    },
     /// Install an agent and its dependencies
     Install {
         /// Agent name or alias