Routing: Prefix frontend UI routes with /library #840 #2466

Also improves migrations and updates the db schema docs.

Signed-off-by: Michael Mayer <michael@photoprism.app>

internal/entity/file.go

@@ -732,7 +732,7 @@ func (m *File) AddFace(f face.Face, subjUid string) {
 	// Create new marker from face.
 	marker := NewFaceMarker(f, *m, subjUid)
 
-	// Failed creating new marker?
+	// RunFailed creating new marker?
 	if marker == nil {
 		return
 	}