feat(#2591): add GET /api/build-log/<node_id> {,/raw} query endpoints

The raw-graph wire drops the inline build_log_id; the client fetches a
node's captured output on demand. Two handlers resolve node id -> log-row
id (JobQueue::build_log_id_of, now keyed by the wire u64) then delegate to
the existing get_full / raw handlers: /api/build-log/<node_id> serves the
BuildLogFull JSON ({stdout, stderr} + header), /raw serves text/plain.
404 when the node has no linked log.

hive-c0re/src/job_queue/mod.rs

@@ -511,15 +511,19 @@ impl JobQueue {
         true
     }
 
-    /// The `build_logs` row id linked to `node_id`, if any — the lookup behind
-    /// the `GET /api/build-log/<node_id>` query endpoint (the client fetches a
-    /// node's captured build output on demand rather than receiving it inline).
+    /// The `build_logs` row id linked to the wire node id `node_id`, if any —
+    /// the lookup behind the `GET /api/build-log/<node_id>` query endpoint (the
+    /// client fetches a node's captured build output on demand rather than
+    /// receiving it inline). Takes the raw wire `u64` (the endpoint's path
+    /// param); `node_rt` is keyed by the opaque `NodeId`, so this scans for the
+    /// matching id — the map is small (live + recently-terminal nodes).
     #[must_use]
-    pub fn build_log_id_of(&self, node_id: NodeId) -> Option<i64> {
+    pub fn build_log_id_of(&self, node_id: u64) -> Option<i64> {
         self.lock()
             .node_rt
-            .get(&node_id)
-            .and_then(|r| r.build_log_id)
+            .iter()
+            .find(|(nid, _)| nid.get() == node_id)
+            .and_then(|(_, rt)| rt.build_log_id)
     }
 
     /// A DAG's terminal roll-up summary, computed on demand from its container.

hive-c0re/src/job_queue/tests.rs

@@ -896,7 +896,7 @@ fn set_build_log_id_links_running_node() {
     // The log id is fetched by node id (the `GET /api/build-log/<id>` lookup),
     // not carried on the wire — it survives completion in the node runtime.
     assert_eq!(
-        q.build_log_id_of(c.node_id),
+        q.build_log_id_of(c.node_id.get()),
         Some(43),
         "log id survives completion"
     );