chore(tables): own fractional-indexing in-house, drop runtime dep (#4… #18317

Job	Run time
Detect Version	3s
Test and Build / Test and Build	42s
Check Docs Changes	-1s
Build Dev ECR	0s
Build ARM64 (GHCR Only)	0s
Migrate Dev DB	0s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	5m 7s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	36s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	40s
Create GHCR Manifests	0s
Process Docs	0s
Create GitHub Release	-1s
	7m 6s

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