improvement(mcp): post-merge hardening — protocol negotiation + distr… #17490

Job	Run time
Detect Version	3s
Test and Build / Test and Build	4m 42s
Check Docs Changes	0s
Build Dev ECR	-1s
Build ARM64 (GHCR Only)	-1s
Migrate Dev DB	0s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	3m 54s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	29s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	58s
Create GHCR Manifests	-1s
Create GitHub Release	0s
Process Docs	-1s
	10m 2s

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