hive-c0re/swarm-*: drop clippy allows and dedupe unix_now + KV open_or_create

No behaviour change. Casts replaced by try_from / Duration math; schedules.rs
reuses agent_renewal::unix_now; the five swarm-queue-client KV open-or-create
copies share one private kv::open_or_create.

swarm-queue-client/src/agent_schedules.rs

@@ -97,28 +97,13 @@ pub async fn open_or_create(
     client: &async_nats::Client,
 ) -> Result<async_nats::jetstream::kv::Store, crate::Error> {
     let js = async_nats::jetstream::new(client.clone());
-    match js.get_key_value(BUCKET).await {
-        Ok(store) => Ok(store),
-        Err(e) => {
-            tracing::info!(
-                bucket = BUCKET,
-                reason = %e,
-                "agent-schedule bucket not available, creating it"
-            );
-            js.create_key_value(async_nats::jetstream::kv::Config {
-                bucket: BUCKET.to_owned(),
-                description: "Scheduled prompts the swarm controller declares for each agent"
-                    .to_owned(),
-                history: 1,
-                ..Default::default()
-            })
-            .await
-            .map_err(|source| crate::Error::CreateBucket {
-                bucket: BUCKET.to_owned(),
-                source,
-            })
-        }
-    }
+    crate::kv::open_or_create(
+        &js,
+        BUCKET,
+        "agent-schedule",
+        "Scheduled prompts the swarm controller declares for each agent".to_owned(),
+    )
+    .await
 }
 
 /// What reading one agent's key found.