fix(slack): allow empty status to clear the assistant status indicato… #22960

Job	Run time
Detect Version	2s
Build AMD64 (./docker/pii.Dockerfile, ghcr.io/simstudioai/pii, ECR_PII, ubuntu-latest)	3m 7s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP, linux-x64-8-core)	8m 49s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME, ubuntu-lat...	1m 4s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS, ubuntu-latest)	57s
Test and Build / Build App	5m 11s
Test and Build / Lint and Test	11m 46s
Check Docs Changes	-1s
Migrate Dev DB	-1s
Deploy Trigger.dev (Dev)	-1s
Build Dev ECR	0s
Build ARM64 (GHCR Only)	-7s
Migrate DB / Apply Database Migrations	1m 22s
Promote Images	9s
Process Docs	0s
Create GHCR Manifests	0s
Create GitHub Release	0s
	32m 17s

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