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/transport/lan.rs

@@ -24,17 +24,27 @@ pub struct LanTransport {
     our_did: String,
     our_pubkey_hex: String,
     our_port: u16,
+    /// This node's FIPS npub, advertised in the mDNS TXT record so
+    /// co-located peers can form a direct FIPS link (`lan_fips_anchors`)
+    /// without waiting for federation storage to sync.
+    our_fips_npub: Option<String>,
     daemon: Option<ServiceDaemon>,
     available: AtomicBool,
 }
 
 impl LanTransport {
     /// Create a new LAN transport. Does not start discovery yet.
-    pub fn new(our_did: &str, our_pubkey_hex: &str, port: u16) -> Self {
+    pub fn new(
+        our_did: &str,
+        our_pubkey_hex: &str,
+        port: u16,
+        our_fips_npub: Option<String>,
+    ) -> Self {
         Self {
             our_did: our_did.to_string(),
             our_pubkey_hex: our_pubkey_hex.to_string(),
             our_port: port,
+            our_fips_npub,
             daemon: None,
             available: AtomicBool::new(false),
         }
@@ -47,11 +57,14 @@ impl LanTransport {
 
         // Advertise our service
         let hostname = format!("archy-{}.local.", &self.our_pubkey_hex[..8]);
-        let properties = vec![
+        let mut properties = vec![
             ("did".to_string(), self.our_did.clone()),
             ("pubkey".to_string(), self.our_pubkey_hex.clone()),
             ("version".to_string(), "0.1.0".to_string()),
         ];
+        if let Some(npub) = &self.our_fips_npub {
+            properties.push(("fips".to_string(), npub.clone()));
+        }
 
         let service_info = ServiceInfo::new(
             SERVICE_TYPE,
@@ -93,6 +106,11 @@ impl LanTransport {
                             .map(|v| v.val_str().to_string());
                         let addresses = info.get_addresses();
 
+                        let fips_npub = info
+                            .get_properties()
+                            .get("fips")
+                            .map(|v| v.val_str().to_string());
+
                         if let (Some(did), Some(pubkey)) = (did, pubkey) {
                             if let Some(scoped_ip) = addresses.iter().next() {
                                 let ip: std::net::IpAddr = match scoped_ip.to_string().parse() {
@@ -106,6 +124,9 @@ impl LanTransport {
                                     .await;
                                 registry_clone.set_lan_address(&did, socket_addr).await;
                                 registry_clone.set_name(&did, info.get_fullname()).await;
+                                if let Some(npub) = fips_npub.as_deref() {
+                                    registry_clone.set_fips_npub(&did, npub).await;
+                                }
                             }
                         }
                     }

core/archipelago/src/transport/mod.rs

@@ -106,7 +106,7 @@ pub enum PeerSource {
 }
 
 /// Unified peer record with per-transport capabilities.
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct PeerRecord {
     pub did: String,
     pub pubkey_hex: String,