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/server.rs

@@ -664,8 +664,7 @@ impl Server {
                                             .map(|(a, _)| *a)
                                             .unwrap_or(0)
                                             + 1;
-                                        let delay =
-                                            (90u64 << attempts.min(10)).min(86_400);
+                                        let delay = (90u64 << attempts.min(10)).min(86_400);
                                         notify_backoff.insert(
                                             node.did.clone(),
                                             (attempts, now + Duration::from_secs(delay)),