fix(ic-icrc1-index-ng): handle AuthorizedMint and AuthorizedBurn in match arms

- process_balance_changes: credit to/debit from (no fee involved)
- get_accounts: return affected account (to for mint, from for burn)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: bogwar

rs/ledger_suite/icrc1/index-ng/src/main.rs

@@ -985,6 +985,12 @@ fn process_balance_changes(block_index: BlockIndex64, block: &Block<Tokens>) {
             } => {
                 // Does not affect the balance
             }
+            Operation::AuthorizedMint { to, amount, .. } => {
+                credit(block_index, to, amount);
+            }
+            Operation::AuthorizedBurn { from, amount, .. } => {
+                debit(block_index, from, amount);
+            }
         },
     );
 }
@@ -1028,6 +1034,8 @@ fn get_accounts(block: &Block<Tokens>) -> Vec<Account> {
         }
         Operation::Approve { from, .. } => vec![from],
         Operation::FeeCollector { .. } => vec![],
+        Operation::AuthorizedMint { to, .. } => vec![to],
+        Operation::AuthorizedBurn { from, .. } => vec![from],
     }
 }