refactor(client): remove redundant timestamp parameter from poll_timeouts

Use internal monotonic time by default and introduce poll_timeouts_at for callers requiring a specific sampled Instant. This simplifies the API for standard usage while maintaining flexibility for external event loops.

crates/irtt-client/tests/hmac.rs

@@ -3,7 +3,7 @@ mod support;
 use std::time::Duration;
 
 use irtt_client::{
-    Client, ClientConfig, ClientError, ClientEvent, ClientTimestamp, OpenOutcome, SocketConfig,
+    Client, ClientConfig, ClientError, ClientEvent, OpenOutcome, SocketConfig,
     WarningKind,
 };
 use irtt_proto::{echo_packet_len, ProtoError, TimestampFields};

crates/irtt-client/tests/large_packets.rs

@@ -1,6 +1,6 @@
 mod support;
 
-use irtt_client::{Client, ClientConfig, ClientEvent, ClientTimestamp, NegotiationPolicy};
+use irtt_client::{Client, ClientConfig, ClientEvent, NegotiationPolicy};
 use irtt_proto::{echo_header_len, echo_packet_len, Params, TimestampFields};
 
 use support::{config_for_params, default_params, run_one_probe, BackendPeer, ServerObservation};

crates/irtt-client/tests/protocol_options.rs

@@ -1,6 +1,5 @@
 mod support;
 
-use irtt_client::ClientTimestamp;
 use std::time::Duration;
 
 use irtt_client::{

crates/irtt-client/tests/server_fill.rs

@@ -1,7 +1,7 @@
 mod support;
 
 use irtt_client::{
-    Client, ClientConfig, ClientError, ClientEvent, ClientTimestamp, NegotiationPolicy,
+    Client, ClientConfig, ClientError, ClientEvent, NegotiationPolicy,
 };
 use irtt_proto::{echo_packet_len, Params, TimestampFields};
 

crates/irtt-client/tests/support/mod.rs

@@ -11,7 +11,7 @@ use std::{
 };
 
 use irtt_client::{
-    Client, ClientConfig, ClientEvent, ClientTimestamp, NegotiatedParams, OpenOutcome, SocketConfig,
+    Client, ClientConfig, ClientEvent, NegotiatedParams, OpenOutcome, SocketConfig,
 };
 use irtt_proto::{
     compute_hmac_in_place, echo_packet_len, flags, verify_hmac, Clock, Params, ProtoError,