Remove approval confirmation copy

crates/crank-registry/src/migrations.rs

@@ -568,8 +568,6 @@ pub async fn apply_postgres(pool: &PgPool) -> Result<(), sqlx::Error> {
             operation_version integer not null,
             status text not null,
             risk_level text not null,
-            confirmation_title text not null,
-            confirmation_body text not null,
             request_payload_json jsonb not null,
             response_payload_json jsonb null,
             created_at timestamptz not null,
@@ -581,6 +579,13 @@ pub async fn apply_postgres(pool: &PgPool) -> Result<(), sqlx::Error> {
     )
     .execute(pool)
     .await?;
+
+    query("alter table approval_requests drop column if exists confirmation_title")
+        .execute(pool)
+        .await?;
+    query("alter table approval_requests drop column if exists confirmation_body")
+        .execute(pool)
+        .await?;
     query(
         "create index if not exists approval_requests_agent_status_idx
          on approval_requests(workspace_id, agent_id, status, expires_at)",