feat(core): Coordinate manual workflow activation and deactivation in multi-main scenario (#7643)

Followup to #7566 | Story: https://linear.app/n8n/issue/PAY-926

### Manual workflow activation and deactivation

In a multi-main scenario, if the user manually activates or deactivates
a workflow, the process (whether leader or follower) that handles the
PATCH request and updates its internal state should send a message into
the command channel, so that all other main processes update their
internal state accordingly:

- Add to `ActiveWorkflows` if activating
- Remove from `ActiveWorkflows` if deactivating
- Remove and re-add to `ActiveWorkflows` if the update did not change
activation status.

After updating their internal state, if activating or deactivating, the
recipient main processes should push a message to all connected
frontends so that these can update their stores and so reflect the value
in the UI.

### Workflow activation errors

On failure to activate a workflow, the main instance should record the
error in Redis - main instances should always pull activation errors
from Redis in a multi-main scenario.

### Leadership change

On leadership change...

- The old leader should stop pruning and the new leader should start
pruning.
- The old leader should remove trigger- and poller-based workflows and
the new leader should add them.

packages/cli/src/controllers/orchestration.controller.ts

@@ -1,7 +1,7 @@
 import { Authorized, Post, RestController } from '@/decorators';
 import { OrchestrationRequest } from '@/requests';
 import { Service } from 'typedi';
-import { SingleMainInstancePublisher } from '@/services/orchestration/main/SingleMainInstance.publisher';
+import { SingleMainSetup } from '@/services/orchestration/main/SingleMainSetup';
 import { License } from '../License';
 
 @Authorized('any')
@@ -9,7 +9,7 @@ import { License } from '../License';
 @Service()
 export class OrchestrationController {
 	constructor(
-		private readonly orchestrationService: SingleMainInstancePublisher,
+		private readonly singleMainSetup: SingleMainSetup,
 		private readonly licenseService: License,
 	) {}
 
@@ -21,18 +21,18 @@ export class OrchestrationController {
 	async getWorkersStatus(req: OrchestrationRequest.Get) {
 		if (!this.licenseService.isWorkerViewLicensed()) return;
 		const id = req.params.id;
-		return this.orchestrationService.getWorkerStatus(id);
+		return this.singleMainSetup.getWorkerStatus(id);
 	}
 
 	@Post('/worker/status')
 	async getWorkersStatusAll() {
 		if (!this.licenseService.isWorkerViewLicensed()) return;
-		return this.orchestrationService.getWorkerStatus();
+		return this.singleMainSetup.getWorkerStatus();
 	}
 
 	@Post('/worker/ids')
 	async getWorkerIdsAll() {
 		if (!this.licenseService.isWorkerViewLicensed()) return;
-		return this.orchestrationService.getWorkerIds();
+		return this.singleMainSetup.getWorkerIds();
 	}
 }