fix(core): Remove circular dependency in WorkflowService and ActiveWorkflowRunner (#8128)

## Summary
A circular dependency between `WorkflowService` and
`ActiveWorkflowRunner` is sometimes causing `this.activeWorkflowRunner`
to be `undefined` in `WorkflowService`.
Breaking this circular dependency should hopefully fix this issue.

## Related tickets and issues
#8122


## Review / Merge checklist
- [x] PR title and summary are descriptive
- [ ] Tests included

packages/cli/src/workflows/workflowStaticData.service.ts

@@ -0,0 +1,41 @@
+import { Service } from 'typedi';
+import { type IDataObject, type Workflow, ErrorReporterProxy as ErrorReporter } from 'n8n-workflow';
+import { Logger } from '@/Logger';
+import { WorkflowRepository } from '@db/repositories/workflow.repository';
+import { isWorkflowIdValid } from '@/utils';
+
+@Service()
+export class WorkflowStaticDataService {
+	constructor(
+		private readonly logger: Logger,
+		private readonly workflowRepository: WorkflowRepository,
+	) {}
+
+	/** Saves the static data if it changed */
+	async saveStaticData(workflow: Workflow): Promise<void> {
+		if (workflow.staticData.__dataChanged === true) {
+			// Static data of workflow changed and so has to be saved
+			if (isWorkflowIdValid(workflow.id)) {
+				// Workflow is saved so update in database
+				try {
+					await this.saveStaticDataById(workflow.id, workflow.staticData);
+					workflow.staticData.__dataChanged = false;
+				} catch (error) {
+					ErrorReporter.error(error);
+					this.logger.error(
+						// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+						`There was a problem saving the workflow with id "${workflow.id}" to save changed Data: "${error.message}"`,
+						{ workflowId: workflow.id },
+					);
+				}
+			}
+		}
+	}
+
+	/** Saves the given static data on workflow */
+	async saveStaticDataById(workflowId: string, newStaticData: IDataObject): Promise<void> {
+		await this.workflowRepository.update(workflowId, {
+			staticData: newStaticData,
+		});
+	}
+}