hive-c0re/hivectl/hive-agent: pause as a job-queue DAG node (closes #3056)

hive-core-agent-sock/src/lib.rs

@@ -138,6 +138,11 @@ pub enum Request {
     /// serve loop now." Lets the `GracefulStop` orchestration stop the
     /// container immediately instead of waiting out its timeout fallback.
     GracefulStopComplete,
+    /// Harness → c0re: "the `Pause` marker check I run between turns
+    /// (never mid-turn) just flipped `false → true`." Lets the pause
+    /// DAG's drain node resolve immediately instead of waiting out its
+    /// timeout fallback — same shape as `GracefulStopComplete`.
+    PauseAcknowledged,
     /// *(capability-gated: `read_host_journal`)* Fetch recent lines
     /// from the host journal. Filters are all optional; omitting all
     /// returns the last `lines` entries from the global journal.