v0.13.24 — MapStats: split bytes_pending into nontried / retryable

bytes_pending was an opaque aggregate of NonTried + NonTrimmed +
NonScraped. UIs that wanted a "will retry in Pass 2-N" bucket were
stuck showing the entire unread disc as Maybe at pct=0.

Adds two granular fields to MapStats:

  bytes_nontried   — Pass 1 hasn't read these yet
  bytes_retryable  — NonTrimmed + NonScraped, Pass 2-N will retry

bytes_pending stays for back-compat (= bytes_nontried + bytes_retryable).

Also picks up the cargo fmt --check lint that's been red on main CI
since v0.13.18 (rustfmt fold differences on a few long format-string
layouts; functional no-op).

src/scsi/mod.rs

@@ -620,7 +620,11 @@ mod parse_sense_tests {
         // independently of the response code. parse_sense_key must mask
         // it off before classifying the format.
         let s = buf(0xF2, 0x05, 0x77);
-        assert_eq!(parse_sense_key(&s, 8), 5, "VALID-bit must not leak into format detection");
+        assert_eq!(
+            parse_sense_key(&s, 8),
+            5,
+            "VALID-bit must not leak into format detection"
+        );
         let s = buf(0xF0, 0x77, 0x02);
         assert_eq!(parse_sense_key(&s, 18), 2);
     }