chore(db): drop the legacy folder tables and adopt the deferred folder_id FKs #24125

Job	Run time
Test and Build / Build App	14m 24s
Test and Build / Lint and Test	4m 28s
Build ARM64 (GHCR Only)	0s
Build AMD64	0s
Migrate Dev DB	0s
Detect Desktop Changes	0s
Check Docs Changes	0s
Build Dev ECR	0s
Deploy Trigger.dev (Dev)	0s
Check Desktop Signing Secrets	0s
Create Desktop Prerelease	0s
Desktop Prerelease Build	-1s
Publish Desktop Prerelease	-1s
Prune Desktop Prereleases	-1s
Detect Version	-9s
Migrate DB	0s
Create GHCR Manifests	0s
Promote Images	0s
Process Docs	0s
Create GitHub Release	-1s
Desktop Release	-1s
	18m 38s

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