fix(fips): P0 uptime fixes — open peer port 5679, allow /blob+/dwn, fix LAN anchor port, un-deaden direct peering, fast-fail budgets

Phase A1 of docs/FIPS-UPTIME-AND-UI-STATE-PLAN.md — the five changes that
made FIPS fall back to Tor even when a FIPS path existed:

- RC0: the fips.d drop-in now opens PEER_PORT 5679 (was 80+8443 only, so
  every hardened node firewalled peers' FIPS dials; 28k drops on .198)
- RC4: /blob/ and /dwn/ added to the peer-path allowlist — mesh file
  sharing and DWN sync were 404 → 100% Tor by construction
- RC2-G2: lan_fips_anchors dials PUBLISHED_UDP_PORT (2121) instead of the
  dead 8668, with a drift-guard test against the rendered daemon config
- RC2-G1: direct LAN peering actually runs now — mDNS TXT advertises the
  FIPS npub, discovery calls set_fips_npub, and the anchor tick hydrates
  npubs from federation storage for peers on older builds
- RC3: FIPS attempt budget is a hard cap (retry no longer doubles it) and
  the 12 hot call sites get explicit fips_timeout fast-fail so Tor keeps
  its full budget (browse-peer, preview, /blob, DWN, node-message,
  rotation notifies)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

core/archipelago/src/network/dwn_sync.rs

@@ -186,6 +186,7 @@ async fn sync_single_peer(
     let (health_resp, _) = PeerRequest::new(fips_npub, onion, "/dwn/health")
         .service(crate::settings::transport::PeerService::Federation)
         .timeout(std::time::Duration::from_secs(30))
+        .fips_timeout(std::time::Duration::from_secs(6))
         .send_get()
         .await
         .context("Peer DWN unreachable")?;
@@ -211,6 +212,7 @@ async fn sync_single_peer(
     let (pull_res, _) = PeerRequest::new(fips_npub, onion, "/dwn")
         .service(crate::settings::transport::PeerService::Federation)
         .timeout(std::time::Duration::from_secs(30))
+        .fips_timeout(std::time::Duration::from_secs(6))
         .send_json(&pull_body)
         .await
         .context("Failed to query peer DWN")?;
@@ -269,6 +271,7 @@ async fn sync_single_peer(
         match PeerRequest::new(fips_npub, onion, "/dwn")
             .service(crate::settings::transport::PeerService::Federation)
             .timeout(std::time::Duration::from_secs(30))
+            .fips_timeout(std::time::Duration::from_secs(6))
             .send_json(&push_body)
             .await
         {