fix(mcp): bound and tear down one-shot OAuth fetches so auth can't ha… #22810

Job	Run time
Detect Version	4s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	6m 21s
Test and Build / Build App	2m 53s
Build AMD64 (./docker/pii.Dockerfile, ghcr.io/simstudioai/pii, ECR_PII)	2m 42s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	24s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	57s
Test and Build / Lint and Test	2m 53s
Build ARM64 (GHCR Only)	-1s
Deploy Trigger.dev (Dev)	-1s
Check Docs Changes	-1s
Migrate Dev DB	-9s
Build Dev ECR	0s
Migrate DB / Apply Database Migrations	31s
Promote Images	15s
Create GHCR Manifests	-1s
Process Docs	-1s
Create GitHub Release	-1s
	16m 45s

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