feat(event-dispatcher): unify event dispatch via EventInterface trait

Extract a superclass-trait EventInterface from the base Event.

pool_builder's PrePoolCreateEvent stays deferred: its constructor needs
owned, non-cloneable Request and repository boxes the builder only holds
by reference (owned-payload blocker). The event is plugin-only, so its
construction is re-tagged TODO(plugin).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/crates/shirabe/src/plugin/pre_pool_create_event.rs b/crates/shirabe/src/plugin/pre_pool_create_event.rs
index 2bbaa6c..303159a 100644
--- a/crates/shirabe/src/plugin/pre_pool_create_event.rs
+++ b/crates/shirabe/src/plugin/pre_pool_create_event.rs
@@ -2,8 +2,11 @@
 
 use indexmap::IndexMap;
 
+use shirabe_php_shim::PhpMixed;
+
 use crate::dependency_resolver::Request;
 use crate::event_dispatcher::Event;
+use crate::event_dispatcher::EventInterface;
 use crate::package::BasePackageHandle;
 use crate::repository::RepositoryInterface;
 
@@ -92,3 +95,25 @@ impl PrePoolCreateEvent {
         self.unacceptable_fixed_packages = packages;
     }
 }
+
+impl EventInterface for PrePoolCreateEvent {
+    fn get_name(&self) -> &str {
+        self.inner.get_name()
+    }
+
+    fn get_arguments(&self) -> &Vec<String> {
+        self.inner.get_arguments()
+    }
+
+    fn get_flags(&self) -> &IndexMap<String, PhpMixed> {
+        self.inner.get_flags()
+    }
+
+    fn is_propagation_stopped(&self) -> bool {
+        self.inner.is_propagation_stopped()
+    }
+
+    fn stop_propagation(&mut self) {
+        self.inner.stop_propagation();
+    }
+}