release: v1.5.0-alpha + version hygiene fixes

Versioning was drifting on three axes — fixed all of them:

1. Cargo.toml → 1.5.0-alpha (was 1.5.0). User wants `-alpha` suffix
   on every pre-stable release; this is the current state of main.
2. neode-ui/package.json was still 1.3.5 — brought in line.
3. /opt/archipelago/build-info.txt was stale on .198 (1.3.4) and
   .253 (1.3.5), absent on .116/.228. That file OVERRIDES the
   binary's CARGO_PKG_VERSION for the UI sidebar, which is why
   .198/.253 kept showing old versions even with fresh binaries.
   scripts/deploy-to-target.sh now writes build-info.txt on every
   deploy, reading the version straight from Cargo.toml — so the
   sidebar can never drift from the binary again.

Release artifacts + manifest:
- releases/v1.5.0-alpha/archipelago (40M, sha in manifest)
- releases/v1.5.0-alpha/archipelago-frontend-1.5.0-alpha.tar.gz (51M)
- releases/manifest.json bumped with full 7-line changelog covering
  FIPS-first routing, Settings toggle, transitive federation, cancel
  button, transport badges, peer listener, and the build-info fix.
- scripts/check-release-manifest.sh — new pre-publish guard. Refuses
  to pass if: Cargo.toml ≠ manifest version, changelog is empty
  (release notes are mandatory), or any component's sha256/size
  doesn't match the file on disk. Run locally or from CI.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/deploy-to-target.sh

@@ -923,6 +923,19 @@ PYEOF
 }
 MANIFEST_EOF
 
+    # Write build-info.txt — this is what the UI sidebar reads for the
+    # displayed version (overrides the binary's CARGO_PKG_VERSION). Keeping
+    # it synced with Cargo.toml on every deploy prevents the 1.3.x drift
+    # we saw on .198/.253 where stale build-info survived across upgrades.
+    DEPLOY_PKG_VERSION=$(grep '^version' "$PROJECT_DIR/core/archipelago/Cargo.toml" | head -1 | sed -E 's/.*"([^"]+)".*/\1/')
+    ssh $SSH_OPTS "$TARGET_HOST" "sudo tee /opt/archipelago/build-info.txt > /dev/null" << BUILDINFO_EOF
+version=$DEPLOY_PKG_VERSION
+build=$DEPLOY_TS
+commit=$DEPLOY_COMMIT
+date=$DEPLOY_TS
+type=deployed
+BUILDINFO_EOF
+
     # Ensure NTP and swap are configured (prevents OOM kills and clock drift)
     progress "Ensuring NTP + swap"
     ssh $SSH_OPTS "$TARGET_HOST" '