Implementation plan + Phase 1 finished

src/proxy/tests/middle_relay_baseline_invariant_tests.rs

@@ -0,0 +1,38 @@
+use super::*;
+use std::time::{Duration, Instant};
+
+#[test]
+fn middle_relay_baseline_public_api_idle_roundtrip_contract() {
+    let _guard = relay_idle_pressure_test_scope();
+    clear_relay_idle_pressure_state_for_testing();
+
+    assert!(mark_relay_idle_candidate(7001));
+    assert_eq!(oldest_relay_idle_candidate(), Some(7001));
+
+    clear_relay_idle_candidate(7001);
+    assert_ne!(oldest_relay_idle_candidate(), Some(7001));
+
+    assert!(mark_relay_idle_candidate(7001));
+    assert_eq!(oldest_relay_idle_candidate(), Some(7001));
+
+    clear_relay_idle_pressure_state_for_testing();
+}
+
+#[test]
+fn middle_relay_baseline_public_api_desync_window_contract() {
+    let _guard = desync_dedup_test_lock()
+        .lock()
+        .unwrap_or_else(|poisoned| poisoned.into_inner());
+    clear_desync_dedup_for_testing();
+
+    let key = 0xDEAD_BEEF_0000_0001u64;
+    let t0 = Instant::now();
+
+    assert!(should_emit_full_desync(key, false, t0));
+    assert!(!should_emit_full_desync(key, false, t0 + Duration::from_secs(1)));
+
+    let t1 = t0 + DESYNC_DEDUP_WINDOW + Duration::from_millis(10);
+    assert!(should_emit_full_desync(key, false, t1));
+
+    clear_desync_dedup_for_testing();
+}