feat(events): add generic Event Bus and /events/wait endpoint for agent wakeups

server/src/state.rs

@@ -5,6 +5,13 @@ use std::collections::HashMap;
 use std::path::PathBuf;
 use std::sync::{Arc, RwLock};
 
+#[derive(Clone, Debug, serde::Serialize, serde::Deserialize)]
+pub struct GenericEvent {
+    pub topic: String,
+    pub session_id: Option<String>,
+    pub payload: serde_json::Value,
+}
+
 pub struct MemoryState {
     pub base_dir: PathBuf,
     pub graph: Store<KnowledgeGraph>,
@@ -29,6 +36,7 @@ pub struct MemoryState {
     pub context_workspaces: Store<Vec<ContextWorkspace>>,
     pub recent_activities: Store<std::collections::VecDeque<serde_json::Value>>,
     pub activity_tx: tokio::sync::broadcast::Sender<String>,
+    pub event_bus_tx: tokio::sync::broadcast::Sender<GenericEvent>,
 }
 
 impl MemoryState {
@@ -72,6 +80,7 @@ impl MemoryState {
             context_workspaces: Store::new("context_workspaces", db.clone()),
             recent_activities: Store::new("recent_activities", db.clone()),
             activity_tx: tokio::sync::broadcast::channel(100).0,
+            event_bus_tx: tokio::sync::broadcast::channel(1000).0,
         }
     }