jobq: rename the builder parameters too, not just the alias

Renaming `pub type Job` fixed the definition and left every use site
reading `b` and `job` — including `job: super::JobBuilder`, where the
parameter still asserted it was a job while its type said otherwise.
The propagation is what the issue was about, so the parameters are the
half that matters at a call site.

Two spots deliberately untouched: `auto_update`'s `sort_by(|a, b| …)`
comparator, and the prose that means the job *queue* (main.rs's
"Job-queue scheduler", scheduler.rs's "not this module's job any more",
the "grown job rejected" log).

315 tests pass unchanged.

hive-c0re/src/workers/auto_update.rs

@@ -327,7 +327,7 @@ pub async fn run(coord: Arc<Coordinator>) -> Result<()> {
 /// kind-derived resources were removed, which drops the agent lease a boot
 /// reconcile needs to not race another DAG's container ops.
 pub(crate) fn boot_nodes(
-    b: &crate::job_queue::JobBuilder,
+    builder: &crate::job_queue::JobBuilder,
     any_stale: bool,
     fanout: Vec<String>,
     drifted: Vec<String>,
@@ -341,7 +341,7 @@ pub(crate) fn boot_nodes(
     // ⇒ no meta commit on a no-change boot. The `fanout` list rides the
     // MetaLock into `run_meta_lock`, which appends the rebuild subgraphs.
     if any_stale {
-        let _ = b
+        let _ = builder
             .node(NodeKind::MetaLock {
                 sweep: true,
                 fanout: Some(fanout),
@@ -356,7 +356,9 @@ pub(crate) fn boot_nodes(
     for name in drifted {
         // Name the lease before the agent string moves into the kind.
         let lease = Resource::Agent(name.clone());
-        let _ = b.node(NodeKind::Reconcile { agent: name }).needs(lease);
+        let _ = builder
+            .node(NodeKind::Reconcile { agent: name })
+            .needs(lease);
     }
 }