bump ureq 3.4.2 + preserve rolling-idle body timeout

ureq 3.4.1 (#1194, "Fix timeout budgets restarting and applying to later
phases") made timeout_recv_response bound only the response HEADERS and
turned timeout_recv_body into an ABSOLUTE total-body deadline. The online
key-service POST set recv_response only, so under 3.4.2 the reply body read
had NO deadline at all — a server that sent headers then stalled mid-reply
would hang the key request forever.

The /decode reply is a small JSON key answer that arrives in one read (a
few hundred bytes; the 1 MiB cap is a defensive anti-OOM ceiling, not an
expected size), so this is a fine total-cap case, not a large-body slow-link
download: no rolling-idle connector is warranted. Set timeout_recv_body to
the same TIMEOUT_SECS total ceiling so the POST can never hang forever.

Regression guard the_reply_body_read_is_bounded_not_only_the_headers asserts
recv_body is now set. Full suite + precommit (fmt/clippy/deny/tests) green.

Cargo.lock

@@ -946,9 +946,9 @@ checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
 [[package]]
 name = "ureq"
-version = "3.4.0"
+version = "3.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "972d7902c8735f2695410b8aed7df6ed12a47394aa1c8d7af49f0497b731a94d"
+checksum = "9a7ac20be9b7726e0bbdbf974c059676d9acb1cd414961f570a4e8231cacd7fc"
 dependencies = [
  "base64",
  "cookie_store",

src/online.rs

@@ -287,6 +287,10 @@ fn hardened_agent(pinned: Vec<SocketAddr>) -> ureq::Agent {
         .max_redirects(0)
         .timeout_connect(Some(Duration::from_secs(10)))
         .timeout_recv_response(Some(Duration::from_secs(TIMEOUT_SECS)))
+        // Since ureq 3.4.1 (#1194) recv_response bounds only the HEADERS; without
+        // a body deadline a stalled reply hangs the POST forever. The JSON key
+        // answer arrives in one read, so a TOTAL cap is the right shape here.
+        .timeout_recv_body(Some(Duration::from_secs(TIMEOUT_SECS)))
         .build();
     // `with_parts`, never `new_with_config` — see [`PinnedResolver`].
     ureq::Agent::with_parts(config, DefaultConnector::new(), PinnedResolver(pinned))
@@ -917,6 +921,22 @@ mod tests {
         );
     }
 
+    // The POST reply body has its own deadline, not just the headers: ureq
+    // 3.4.1+ recv_response covers headers only, so without recv_body a stalled
+    // reply would hang the key request forever.
+    #[test]
+    fn the_reply_body_read_is_bounded_not_only_the_headers() {
+        let agent = hardened_agent(Vec::new());
+        let t = agent.config().timeouts();
+        assert_eq!(
+            t.recv_body,
+            Some(Duration::from_secs(TIMEOUT_SECS)),
+            "ureq 3.4.1+ recv_response covers headers only; without recv_body the \
+             reply read has no deadline at all"
+        );
+        assert_eq!(t.recv_response, Some(Duration::from_secs(TIMEOUT_SECS)));
+    }
+
     #[test]
     fn resolve_and_guard_accepts_public_literal() {
         // Public numeric hosts resolve without DNS — must be accepted.