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

docs/web-ui/dashboard.md

@@ -1060,7 +1060,6 @@ renderApprovals`) with three stacked sections:
   | `merge_config_pr` | `⇒` | `merge-pr` | PR-head sha (`sha_short`) |
   | `update_meta_inputs` | `↻` | `meta-update` | — |
   | `schedule_prompt` | `⏱` | `schedule` | — |
-  | `init_config` | `⊕` | `init` | — |
   | `spawn` | `⊕` | `spawn` | — |
 
   The chip ticks live every second via a `data-requested-at`
@@ -1074,8 +1073,7 @@ renderApprovals`) with three stacked sections:
     config PR into `agent-configs/<agent>/pulls/<pr_number>` (shown
     only when `forge_present` and `pr_number` is set). The config diff
     lives on the forge PR itself — no inline diff side-panel.
-  - `init_config` / `spawn`: a one-line "container will be created"
-    note instead.
+  - `spawn`: a one-line "container will be created" note instead.
 - **decision actions** — `◆ APPR0VE` and `DENY`. Deny pops a
   `prompt()` for an optional reason carried to the submitting agent as
   `HelperEvent::ApprovalResolved.note`.