feat(fips): fallback telemetry — per-reason counters in fips.status + last-transport recording on all dial sites

Phase A2 of docs/FIPS-UPTIME-AND-UI-STATE-PLAN.md (RC6). Fallbacks to Tor
were debug!-only and uncounted, so "FIPS uptime" was unfalsifiable and
paths that were 100% Tor by construction went unnoticed for months.

- fips::telemetry: process-lifetime counters for FIPS successes and the
  six fallback reasons (no_npub, service_inactive, dns_fail, connect_fail,
  http_404, http_5xx), exposed as `dial_stats` in fips.status
- dial.rs: every fallback branch now counts + logs at info! with a
  `reason` field (resolve/connect/status branches)
- PeerRequest::record_transport(data_dir): opt-in hook that writes the
  transport actually used to federation storage off the hot path — wired
  into the dial sites that never recorded (DWN sync ×3, mesh blob fetch,
  federation deploy notify, onion-rotation notify, node messages via a
  new send_to_peer data-dir param)

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

core/archipelago/src/api/rpc/bitcoin_relay.rs

@@ -465,6 +465,7 @@ impl RpcHandler {
             signing_key.as_ref().map(|i| i.signing_key()),
             Some(&peer.pubkey),
             data.server_info.name.as_deref(),
+            Some(&self.config.data_dir),
         )
         .await
     }

core/archipelago/src/api/rpc/federation/handlers.rs

@@ -866,7 +866,8 @@ impl RpcHandler {
             )
             .service(crate::settings::transport::PeerService::Peers)
             .timeout(std::time::Duration::from_secs(30))
-            .fips_timeout(std::time::Duration::from_secs(6));
+            .fips_timeout(std::time::Duration::from_secs(6))
+            .record_transport(&self.config.data_dir);
 
             match req.send_json(&body).await {
                 Ok((resp, transport)) if resp.status().is_success() => {

core/archipelago/src/api/rpc/fips.rs

@@ -13,7 +13,14 @@ use anyhow::Result;
 impl RpcHandler {
     pub(super) async fn handle_fips_status(&self) -> Result<serde_json::Value> {
         let status = fips::FipsStatus::query(&self.config.data_dir).await;
-        Ok(serde_json::to_value(status)?)
+        let mut v = serde_json::to_value(status)?;
+        // Dial outcome counters (process-lifetime): how often peer dials
+        // used FIPS vs fell back to Tor, broken down by reason. This is
+        // the observability that makes "FIPS uptime" measurable.
+        if let Some(obj) = v.as_object_mut() {
+            obj.insert("dial_stats".to_string(), fips::telemetry::snapshot());
+        }
+        Ok(v)
     }
 
     /// Everything the companion app needs to join this node's mesh, embedded

core/archipelago/src/api/rpc/mesh/typed_messages.rs

@@ -821,6 +821,7 @@ impl RpcHandler {
                 .service(crate::settings::transport::PeerService::MeshFileSharing)
                 .timeout(std::time::Duration::from_secs(120))
                 .fips_timeout(std::time::Duration::from_secs(8))
+                .record_transport(&self.config.data_dir)
                 .send_get()
                 .await
                 .map_err(|e| anyhow::anyhow!("Fetch failed: {}", e))?;

core/archipelago/src/api/rpc/network.rs

@@ -137,6 +137,7 @@ impl RpcHandler {
             None,
             None,
             None,
+            Some(&self.config.data_dir),
         )
         .await?;
 
@@ -225,6 +226,7 @@ impl RpcHandler {
             signing_key.as_ref().map(|i| i.signing_key()),
             Some(&req.from_pubkey),
             data.server_info.name.as_deref(),
+            Some(&self.config.data_dir),
         )
         .await
         {

core/archipelago/src/api/rpc/peers.rs

@@ -133,6 +133,7 @@ impl RpcHandler {
             Some(node_id.signing_key()),
             recipient_pubkey.as_deref(),
             node_name.as_deref(),
+            Some(&self.config.data_dir),
         )
         .await?;
         Ok(serde_json::json!({ "ok": true, "sent_to": onion }))

core/archipelago/src/api/rpc/tor/mod.rs

@@ -499,7 +499,8 @@ pub(super) async fn notify_federation_peers_address_change(
                         )
                         .service(crate::settings::transport::PeerService::Peers)
                         .timeout(std::time::Duration::from_secs(30))
-                        .fips_timeout(std::time::Duration::from_secs(6));
+                        .fips_timeout(std::time::Duration::from_secs(6))
+                        .record_transport(data_dir);
                         match req.send_json(&payload).await {
                             Ok((_, transport)) => {
                                 info!(peer_did = %peer.did, transport = %transport, "Notified peer of address change")