Add vm_error field for transactions in Block Replay

docs/rpc/components/schemas/block-replay.schema.yaml

@@ -77,5 +77,5 @@ properties:
           type: string
           description: transaction id
         vm_error:
-          type: string
+          type: [string, "null"]
           description: optional vm error (for runtime failures)

stackslib/src/net/tests/inv/nakamoto.rs

@@ -527,6 +527,8 @@ where
                 },
                 NakamotoBootTenure::NoSortition(boot_steps) => {
                     let boot_steps_len = boot_steps.len();
+                    // when NakamotoBootTenure::NoSortition is in place we have every NakamotoBootStep::Block
+                    // followed by NakamotoBootStep::TenureExtend (this is why with index by boot_steps_len - 2)
                     match boot_steps.get_mut(boot_steps_len - 2).unwrap() {
                         NakamotoBootStep::Block(transactions) => {
                             transactions.append(&mut tip_transactions)

stackslib/src/net/tests/mod.rs

@@ -102,7 +102,9 @@ pub struct NakamotoBootPlan {
     pub network_id: u32,
     pub txindex: bool,
     pub epochs: Option<EpochList<ExecutionCost>>,
+    /// Additional transactions to include in the tip block
     pub tip_transactions: Vec<StacksTransaction>,
+    /// Do not fail if a transaction returns error (by default the BootPlan will stop on tx failure)
     pub ignore_transaction_errors: bool,
 }