fix: pr reviews

Author: troykessler

rust/main/agents/relayer/src/msg/metadata/sealevel_composite.rs

@@ -156,7 +156,7 @@ async fn build_metadata_from_spec_inner(
         }
 
         CompositeIsmMetadataSpec::Aggregation {
-            threshold: _,
+            threshold,
             sub_specs,
         } => {
             let ism_count = sub_specs.len();
@@ -169,6 +169,11 @@ async fn build_metadata_from_spec_inner(
                 }
             }
 
+            let valid_count = sub_results.iter().filter(|r| r.is_some()).count();
+            if valid_count < *threshold as usize {
+                return Err(MetadataBuildError::CouldNotFetch);
+            }
+
             // Pack into aggregation format:
             //   [start_0(4b)][end_0(4b)] ... [start_n(4b)][end_n(4b)] [data_0] [data_1] ...
             // (0,0) means no metadata for that ISM.

rust/sealevel/programs/ism/composite-ism/src/accounts.rs

@@ -83,9 +83,9 @@ pub enum IsmNode {
     /// verify time, so heap usage is O(1) and the number of supported domains is
     /// unlimited.
     ///
-    /// Each domain PDA is at seeds `[DOMAIN_ISM_SEED, &[table_id], &domain.to_le_bytes()]`.
-    /// The `table_id` field namespaces this routing table so that multiple `Routing`
-    /// nodes in the same ISM tree can coexist (e.g. inside an `Aggregation`).
+    /// Each domain PDA is at seeds `[DOMAIN_ISM_SEED, &domain.to_le_bytes()]`
+    /// (see [`derive_domain_pda`]). At most one `Routing` node is allowed per ISM
+    /// tree (enforced by `validate_config`), so no namespace field is needed.
     ///
     /// `RateLimited` inside a domain PDA is disallowed by `SetDomainIsm` validation
     /// (writeback requires the domain PDA to be writable, which is not supported).

rust/sealevel/programs/ism/composite-ism/src/instruction.rs

@@ -125,7 +125,7 @@ pub fn update_config_instruction(
         program_id,
         data: Instruction::UpdateConfig(root).encode()?,
         accounts: vec![
-            AccountMeta::new(owner, true),
+            AccountMeta::new_readonly(owner, true),
             AccountMeta::new(storage_pda_key, false),
         ],
     })