Remove chain supervisor capability

Chains no longer spawn a supervisor task. Checkpoint contracts will be
automatically run as part of the DAG execution when dependencies complete.

- Remove supervisor task creation from start_chain handler
- Remove chain supervisor CLI commands
- Remove supervisor_task_id from StartChainResponse
- Remove withSupervisor option from frontend

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 0 insertions, 16 deletions

diff --git a/makima/src/db/repository.rs b/makima/src/db/repository.rs
index fb430ab..ec233ba 100644
--- a/makima/src/db/repository.rs
+++ b/makima/src/db/repository.rs
@@ -5687,22 +5687,6 @@ pub async fn get_chain_definition_graph(
     }))
 }
 
-/// Set the supervisor task ID for a chain.
-pub async fn set_chain_supervisor_task(
-    pool: &PgPool,
-    chain_id: Uuid,
-    supervisor_task_id: Option<Uuid>,
-) -> Result<(), sqlx::Error> {
-    sqlx::query(
-        "UPDATE chains SET supervisor_task_id = $2, updated_at = NOW() WHERE id = $1",
-    )
-    .bind(chain_id)
-    .bind(supervisor_task_id)
-    .execute(pool)
-    .await?;
-    Ok(())
-}
-
 /// Update chain status.
 pub async fn update_chain_status(
     pool: &PgPool,