Fix type mismatch between table and view (#6039)

vlan_id column in switchport settings child table is type `Int4`, but
`bgp_peer_view`'s diesel schema is `Int8`, causing an error when
deserializing data from the view (allocated buffer is larger than the
received bytes).

nexus/db-model/src/bgp.rs

@@ -5,7 +5,7 @@
 use crate::schema::{
     bgp_announce_set, bgp_announcement, bgp_config, bgp_peer_view,
 };
-use crate::SqlU32;
+use crate::{SqlU16, SqlU32};
 use db_macros::Resource;
 use ipnetwork::IpNetwork;
 use nexus_types::external_api::params;
@@ -141,5 +141,5 @@ pub struct BgpPeerView {
     pub multi_exit_discriminator: Option<SqlU32>,
     pub local_pref: Option<SqlU32>,
     pub enforce_first_as: bool,
-    pub vlan_id: Option<SqlU32>,
+    pub vlan_id: Option<SqlU16>,
 }

nexus/db-model/src/schema.rs

@@ -281,7 +281,7 @@ table! {
         multi_exit_discriminator -> Nullable<Int8>,
         local_pref -> Nullable<Int8>,
         enforce_first_as -> Bool,
-        vlan_id -> Nullable<Int8>,
+        vlan_id -> Nullable<Int4>,
     }
 }
 

nexus/src/app/background/tasks/sync_switch_configuration.rs

@@ -965,7 +965,7 @@ impl BackgroundTask for SwitchPortSettingsManager {
                                     communities: Vec::new(),
                                     allowed_export: ImportExportPolicy::NoFiltering,
                                     allowed_import: ImportExportPolicy::NoFiltering,
-                                    vlan_id: c.vlan_id.map(|x| x.0 as u16),
+                                    vlan_id: c.vlan_id.map(|x| x.0),
                                 }
                         }).collect(),
                         port: port.port_name.clone(),