feat: merge-train/fairies-v5 (#24702)

See
[merge-train-readme.md](https://github.com/AztecProtocol/aztec-packages/blob/next/.github/workflows/merge-train-readme.md).
This is a merge-train.

Author: nventuro

noir-projects/aztec-nr/aztec/src/messages/processing/log_retrieval_response.nr

@@ -1,5 +1,8 @@
 use crate::messages::logs::note::MAX_NOTE_PACKED_LEN;
-use crate::protocol::{constants::{MAX_NOTE_HASHES_PER_TX, PRIVATE_LOG_CIPHERTEXT_LEN}, traits::Deserialize};
+use crate::protocol::{
+    constants::{MAX_NOTE_HASHES_PER_TX, PRIVATE_LOG_CIPHERTEXT_LEN},
+    traits::{Deserialize, Serialize},
+};
 
 pub global MAX_PUBLIC_LOG_LEN_FOR_NOTE_COMPLETION: u32 = MAX_NOTE_PACKED_LEN;
 
@@ -11,7 +14,7 @@ pub(crate) global MAX_LOG_CONTENT_LEN: u32 = std::cmp::max(
 /// A response to a `LogRetrievalRequest`, containing the payload of a log (i.e. the content minus the tag, called
 /// plaintext for public logs and ciphertext for private), plus contextual information about the transaction in which
 /// the log was emitted. This is the data required in order to discover notes that are being delivered in a log.
-#[derive(Deserialize, Eq)]
+#[derive(Deserialize, Eq, Serialize)]
 pub struct LogRetrievalResponse {
     pub log_payload: BoundedVec<Field, MAX_LOG_CONTENT_LEN>,
     pub tx_hash: Field,

noir-projects/aztec-nr/aztec/src/messages/processing/mod.nr

@@ -95,6 +95,13 @@ pub unconstrained fn enqueue_note_for_validation(
     ))
 }
 
+/// The note validation requests enqueued so far in the current context via [`enqueue_note_for_validation`], before
+/// [`validate_and_store_enqueued_notes_and_events`] drains them. Exists so tests can inspect the pending queue;
+/// production code should not read requests back once enqueued.
+pub(crate) unconstrained fn get_enqueued_note_validation_requests() -> EphemeralArray<NoteValidationRequest> {
+    EphemeralArray::at(NOTE_VALIDATION_REQUESTS_ARRAY_BASE_SLOT)
+}
+
 /// Enqueues an event for validation and storage by PXE.
 ///
 /// This is the primary way for custom message handlers (registered via