feat(context-injector): enhance context collector functionality

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src/features/context-injector/collector.ts

@@ -70,6 +70,10 @@ export class ContextCollector {
     this.sessions.delete(sessionID)
   }
 
+  clearAll(): void {
+    this.sessions.clear()
+  }
+
   hasPending(sessionID: string): boolean {
     const sessionMap = this.sessions.get(sessionID)
     return sessionMap !== undefined && sessionMap.size > 0