pageserver: more detailed logs when calling re-attach (#9996)

## Problem

We saw a peculiar case where a pageserver apparently got a 0-tenant
response to `/re-attach` but we couldn't see the request landing on a
storage controller. It was hard to confirm retrospectively that the
pageserver was configured properly at the moment it sent the request.

## Summary of changes

- Log the URL to which we are sending the request
- Log the NodeId and metadata that we sent

libs/pageserver_api/src/controller_api.rs

@@ -48,7 +48,7 @@ pub struct TenantCreateResponse {
     pub shards: Vec<TenantCreateResponseShard>,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct NodeRegisterRequest {
     pub node_id: NodeId,
 
@@ -75,7 +75,7 @@ pub struct TenantPolicyRequest {
     pub scheduling: Option<ShardSchedulingPolicy>,
 }
 
-#[derive(Clone, Serialize, Deserialize, PartialEq, Eq, Hash)]
+#[derive(Clone, Serialize, Deserialize, PartialEq, Eq, Hash, Debug)]
 pub struct AvailabilityZone(pub String);
 
 impl Display for AvailabilityZone {