feat(core): Migration for soft deletions for executions (#7088)

Based on https://github.com/n8n-io/n8n/pull/7065

---------

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/cli/src/databases/entities/ExecutionEntity.ts

@@ -49,6 +49,9 @@ export class ExecutionEntity {
 	@Column({ type: datetimeColumnType, nullable: true })
 	stoppedAt: Date;
 
+	@Column(datetimeColumnType)
+	deletedAt: Date;
+
 	@Column({ nullable: true })
 	workflowId: string;