fix(auth): gate email-otp auto-signup behind DISABLE_EMAIL_SIGNUP (#5… #23000

Job	Run time
Detect Version	4s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP, linux-x64-8-core)	3m 34s
Build AMD64 (./docker/pii.Dockerfile, ghcr.io/simstudioai/pii, ECR_PII, ubuntu-latest)	28s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME, ubuntu-lat...	49s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS, ubuntu-latest)	46s
Test and Build / Build App	2m 53s
Test and Build / Lint and Test	3m 43s
Migrate Dev DB	-1s
Build ARM64 (GHCR Only)	-1s
Deploy Trigger.dev (Dev)	0s
Check Docs Changes	-7s
Build Dev ECR	0s
Migrate DB / Apply Database Migrations	25s
Promote Images	14s
Process Docs	0s
Create GHCR Manifests	0s
Create GitHub Release	0s
	12m 47s

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