refactor(sim): consolidate record guards + pure utils into @sim/utils… #19131

Job	Run time
Detect Version	4s
Test and Build / Test and Build	5m 32s
Check Docs Changes	0s
Migrate Dev DB	-8s
Build ARM64 (GHCR Only)	0s
Build Dev ECR	0s
Migrate DB / Apply Database Migrations	54s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	52s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	4m 27s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	47s
Create GHCR Manifests	0s
Create GitHub Release	0s
Process Docs	-1s
	12m 27s

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