feat(sdk,plugins): API publique d'accès fichiers/workspace + analyse structure (#124,#129)

crates/domain/src/events.rs

@@ -366,6 +366,15 @@ pub enum DomainEvent {
         /// The project.
         project_id: ProjectId,
     },
+    /// A file under a project workspace changed through a public plugin workspace API.
+    PluginWorkspaceFileChanged {
+        /// The owning project.
+        project_id: ProjectId,
+        /// Normalized path relative to the project root.
+        path: String,
+        /// Public operation label, for example `changed`.
+        operation: String,
+    },
     /// An orchestrator request (dropped under `.ideai/requests/`) was processed
     /// by IdeA on behalf of a requester agent (ARCHITECTURE §14.3). Relayed so the
     /// frontend can surface orchestration activity; the resulting cell/tab opens