Make Blockstore populate TransactionStatusIndex entries (#33756)

A previous change removed logic that populated the
TransactionStatusIndex entries at each of the legacy primary index keys
(0 and 1). While these entries will not be read or written in the
future, these entries are necessary for backwards compatibility. Namely,
branches <= v1.17 expect these entries to be present and .unwrap()'s
could fail if they are not.

So, add the initialization of these entries back into Blockstore logic.
We can remove initialization of these entries once our stable and beta
branches are both versions that do not expect these entries to be
present (should be v1.18).

ledger/src/blockstore.rs

@@ -2109,6 +2109,17 @@ impl Blockstore {
         if !self.is_primary_access() {
             return Ok(());
         }
+
+        // Initialize TransactionStatusIndexMeta if they are not present already
+        if self.transaction_status_index_cf.get(0)?.is_none() {
+            self.transaction_status_index_cf
+                .put(0, &TransactionStatusIndexMeta::default())?;
+        }
+        if self.transaction_status_index_cf.get(1)?.is_none() {
+            self.transaction_status_index_cf
+                .put(1, &TransactionStatusIndexMeta::default())?;
+        }
+
         // If present, delete dummy entries inserted by old software
         // https://github.com/solana-labs/solana/blob/bc2b372/ledger/src/blockstore.rs#L2130-L2137
         let transaction_status_dummy_key = cf::TransactionStatus::as_index(2);
@@ -2152,7 +2163,7 @@ impl Blockstore {
                 highest_primary_index_slot = Some(meta.max_slot);
             }
         }
-        if highest_primary_index_slot.is_some() {
+        if highest_primary_index_slot.is_some_and(|slot| slot != 0) {
             self.set_highest_primary_index_slot(highest_primary_index_slot);
         } else {
             self.db.set_clean_slot_0(true);