style: apply gofmt across Go sources

Repo-wide gofmt sweep: const-block alignment, doc-comment spacing,
statement-after-brace fix in media.go, trailing blank lines. No
semantic changes — whitespace-insensitive diff is empty for every
file in this commit.

internal/services/media_scanner_ev_test.go

@@ -18,10 +18,10 @@ func TestManifestEvNormalization(t *testing.T) {
 		raw  string
 		want int
 	}{
-		{`{"v":1}`, 1},          // old shape: ev absent → v1-or-unknown
-		{`{"v":1,"ev":0}`, 1},   // explicitly unset → same
-		{`{"v":1,"ev":1}`, 1},   // baseline parser stamp
-		{`{"v":1,"ev":2}`, 2},   // post-bump stamp
+		{`{"v":1}`, 1},                     // old shape: ev absent → v1-or-unknown
+		{`{"v":1,"ev":0}`, 1},              // explicitly unset → same
+		{`{"v":1,"ev":1}`, 1},              // baseline parser stamp
+		{`{"v":1,"ev":2}`, 2},              // post-bump stamp
 		{`{"v":1,"entries":[],"ev":3}`, 3}, // sidecar-less ev home
 	}
 	for _, tc := range cases {