refactor(hive-c0re): drop the request_init_config tool and InitConfig approval

swarm-controller's `InitAgentConfigRepo` node already covers config-repo
creation, so this deletes a duplicate rather than a capability; old
`init_config` rows are skipped by `collect_lenient` with no migration, by
operator decision.

Refs #4398

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

@@ -154,13 +154,6 @@ pub enum Request {
     },
 
     // ---- privileged (manager socket only for now) ---------------------------
-    /// *(privileged)* Initialise a brand-new agent's proposed config repo
-    /// and queue an approval for the operator to review.
-    RequestInitConfig {
-        name: String,
-        #[serde(default, skip_serializing_if = "Option::is_none")]
-        description: Option<String>,
-    },
     /// *(privileged)* Stop a sub-agent (graceful).
     Kill { name: String },
     /// *(privileged)* Start a previously-stopped sub-agent container.