This PR adds a reload-safe onboarding Help Center generation status
path. Previously, generation progress was pushed through ActionCable,
which meant the onboarding UI could lose context after a page reload or
missed websocket event. The new endpoint exposes the current generation
id, raw Redis generation state, and Help Center article/category counts
so clients can recover state by fetching from the backend.
**What changed**
- Added an onboarding Help Center generation status endpoint.
- Persisted `help_center_generation_id` when generation is enqueued.
- Removed Help Center generation ActionCable broadcasts completely.
- Kept generation progress in Redis as the backend source of truth.
- Kept Help Center generation out of the onboarding hot path; the
existing onboarding controller does not start generation yet.
**How to test**
1. Start Help Center generation for an account.
2. Fetch the onboarding generation status endpoint and verify it returns
the generation id, Redis state, and article/category counts.
3. Reload the onboarding UI or client state and fetch again to confirm
progress can be recovered without relying on websocket events.
4. Verify skipped/completed generation states are reflected from Redis.
## Related PRs
- https://github.com/chatwoot/chatwoot/pull/14569
- https://github.com/chatwoot/chatwoot/pull/14568
- https://github.com/chatwoot/chatwoot/pull/14567
- https://github.com/chatwoot/chatwoot/pull/14619
- https://github.com/chatwoot/chatwoot/pull/14565 (Primary onboarding
PR)
Depends on: https://github.com/chatwoot/chatwoot/pull/14370
This PR creates a new onboarding controller, this allows more control
that the default account update API. Allowing us to spin tasks and
update details required specifically during the onboarding flow
