ref(core): Introduce protected _getBreadcrumbs() on scope (#8961)

Making it easier to potentially change this e.g. for POTEL.

Author: mydea

packages/core/src/scope.ts

@@ -515,8 +515,9 @@ export class Scope implements ScopeInterface {
 
     this._applyFingerprint(event);
 
-    event.breadcrumbs = [...(event.breadcrumbs || []), ...this._breadcrumbs];
-    event.breadcrumbs = event.breadcrumbs.length > 0 ? event.breadcrumbs : undefined;
+    const scopeBreadcrumbs = this._getBreadcrumbs();
+    const breadcrumbs = [...(event.breadcrumbs || []), ...scopeBreadcrumbs];
+    event.breadcrumbs = breadcrumbs.length > 0 ? breadcrumbs : undefined;
 
     event.sdkProcessingMetadata = {
       ...event.sdkProcessingMetadata,
@@ -551,6 +552,13 @@ export class Scope implements ScopeInterface {
     return this._propagationContext;
   }
 
+  /**
+   * Get the breadcrumbs for this scope.
+   */
+  protected _getBreadcrumbs(): Breadcrumb[] {
+    return this._breadcrumbs;
+  }
+
   /**
    * This will be called after {@link applyToEvent} is finished.
    */