style: apply cargo fmt so the release gate can run

The release gate's first real stage is `cargo fmt --check`, and it had
44 diffs across 15 files — enough to abort `create-release.sh` at step 0
before it touched a version number. Some of that drift is mine from the
last two days, some predates it in files I never opened
(bootstrap.rs, ghost_reaper.rs, openwrt/router.rs), and one is the
regenerated fips/app_ports.rs.

No behaviour change — rustfmt only.

Gate now: 8 of 9 green. The remaining red is cargo-test-weekly exiting
124, which is the 25-minute `timeout` expiring during a cold
CARGO_INCREMENTAL=0 rebuild on a loaded node — the tests never started.
Not a test failure.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

core/archipelago/src/seed.rs

@@ -697,7 +697,10 @@ mod tests {
         // nodes would derive each other's coins.
         let (other_words, _) = MasterSeed::generate().unwrap();
         let (_, other_seed) = MasterSeed::from_mnemonic_words(&other_words.to_string()).unwrap();
-        assert_ne!(a.to_string(), derive_cashu_mnemonic(&other_seed).unwrap().to_string());
+        assert_ne!(
+            a.to_string(),
+            derive_cashu_mnemonic(&other_seed).unwrap().to_string()
+        );
     }
 
     /// It must NOT be the node's own phrase. Restoring ecash into a