rename RecyclePolicy→RotationPolicy, collapse AccessMode, clean OIDC refs

crates/presentation/src/handlers/channels.rs

@@ -81,7 +81,7 @@ pub async fn update_channel(
         description: req.description.map(Some),
         timezone: req.timezone,
         schedule_config: req.schedule_config.map(Into::into),
-        recycle_policy: req.recycle_policy,
+        rotation_policy: req.rotation_policy,
         auto_schedule: req.auto_schedule,
     };
     let channel = application::channels::update::execute(&state.channel_command_deps, cmd).await?;