Fix Linux amd64 Statfs Type cast for media-node disk dedupe build.

Co-authored-by: Cursor <cursoragent@cursor.com>

node/media-node/internal/health/disk_unix.go

@@ -4,18 +4,17 @@ package health
 
 import "syscall"
 
-type fsKey struct {
-	typ  int32
-	val0 int32
-	val1 int32
-}
-
 func diskStat(path string) (total, free uint64, fs fsKey, ok bool) {
 	var st syscall.Statfs_t
 	if err := syscall.Statfs(path, &st); err != nil {
 		return 0, 0, fsKey{}, false
 	}
-	fs = fsKey{typ: st.Type, val0: st.Fsid.X__val[0], val1: st.Fsid.X__val[1]}
+	// st.Type is int64 on amd64 / int32 on some arches — always widen.
+	fs = fsKey{
+		typ:  int64(st.Type),
+		val0: st.Fsid.X__val[0],
+		val1: st.Fsid.X__val[1],
+	}
 	total = st.Blocks * uint64(st.Bsize)
 	free = st.Bavail * uint64(st.Bsize)
 	return total, free, fs, true

node/media-node/internal/health/health.go

@@ -5,6 +5,13 @@ import (
 	"runtime"
 )
 
+// fsKey uniquely identifies a mounted filesystem (dedupe across scan roots).
+type fsKey struct {
+	typ  int64
+	val0 int32
+	val1 int32
+}
+
 type Snapshot struct {
 	UptimeSeconds      int64
 	CPUUsagePercent    float64