smartcontract: add changelog entry for mgroup allowlist PDAs

Author: martinsander00

CHANGELOG.md

@@ -24,6 +24,7 @@ All notable changes to this project will be documented in this file.
   - Record successful GetConfig gRPC calls to ClickHouse for device telemetry tracking
 - Onchain programs
   - Enforce that `CloseAccessPass` only closes AccessPass accounts when `connection_count == 0`, preventing closure while active connections are present.
+  - Move multicast group allowlists from unbounded vecs in AccessPass to dedicated `MGroupAllowlistEntry` PDAs, with self-migration on subscribe
 - Monitor
   - Add sol-balance watcher to track SOL balances for configured accounts and export Prometheus metrics for alerting
 - E2E tests

smartcontract/programs/doublezero-serviceability/src/processors/multicastgroup/allowlist/publisher/add.rs

@@ -84,7 +84,6 @@ pub fn process_add_multicastgroup_pub_allowlist(
         return Err(DoubleZeroError::NotAllowed.into());
     }
 
-    // Create AccessPass if it doesn't exist (with empty allowlist vecs)
     if accesspass_account.data_is_empty() {
         let (expected_pda_account, bump_seed) =
             get_accesspass_pda(program_id, &value.client_ip, &value.user_payer);
@@ -128,7 +127,6 @@ pub fn process_add_multicastgroup_pub_allowlist(
         );
     }
 
-    // Create the MGroupAllowlistEntry PDA (skip if already exists)
     if mgroup_al_entry_account.data_is_empty() {
         let (expected_pda, bump_seed) = get_mgroup_allowlist_entry_pda(
             program_id,

smartcontract/programs/doublezero-serviceability/src/processors/multicastgroup/allowlist/subscriber/add.rs

@@ -85,7 +85,6 @@ pub fn process_add_multicastgroup_sub_allowlist(
         return Err(DoubleZeroError::NotAllowed.into());
     }
 
-    // Create AccessPass if it doesn't exist (with empty allowlist vecs)
     if accesspass_account.data_is_empty() {
         let (expected_pda_account, bump_seed) =
             get_accesspass_pda(program_id, &value.client_ip, &value.user_payer);
@@ -129,7 +128,6 @@ pub fn process_add_multicastgroup_sub_allowlist(
         );
     }
 
-    // Create the MGroupAllowlistEntry PDA (skip if already exists)
     if mgroup_al_entry_account.data_is_empty() {
         let (expected_pda, bump_seed) = get_mgroup_allowlist_entry_pda(
             program_id,