chore(journal): upgrade @fedify/fedify 2.1.16 → 2.2.5

The 2.2.x line was uninstallable when federation landed
(@fedify/webfinger@2.2.x wasn't published); fixed upstream, so move to
latest. Exact pin stays deliberate — a federation library defines the
wire shapes remote instances see.

Verified: typecheck, lint, full unit + integration suites (245 tests,
including the wire-shape assertions: JRD, actor attachment arrays,
PropertyValue fields, dereferenceable Note ids) all green on 2.2.5.
Lockfile diff is a clean 24-line swap of the fedify package family.

Note: a transient cross-suite flake surfaced when running both
integration suites concurrently (shared journal.follows state) —
pre-existing, unrelated to the upgrade; clean re-run green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/journal/package.json

@@ -12,7 +12,7 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@fedify/fedify": "2.1.16",
+    "@fedify/fedify": "2.2.5",
     "@js-temporal/polyfill": "^0.5.1",
     "@logtape/logtape": "^2.0.5",
     "@react-router/node": "catalog:",