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/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