refactor(consensus)!: separate block and mempool transaction verification (#10843)

* refactor(tx-verifier): split spent_utxos into block_ and mempool_ variants

* refactor(tx-verifier): split Service::call into verify_block and verify_mempool helpers

* refactor(tx-verifier): replace &Request in check_maturity_height with plain arguments

* fix(tx-verifier): restore Elapsed error mapping in block_spent_utxos

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* refactor(tx-verifier): drop block_new_outputs from tx_transparent_coinbase_spends_maturity

* Revert "refactor(tx-verifier): drop block_new_outputs from tx_transparent_coinbase_spends_maturity"

This reverts commit d4b627e.

* docs(tx-verifier): clarify mempool-only context in check_maturity_height

* docs(tx-verifier): document check_maturity_height visibility change

* Apply suggestion from @oxarbitrage

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>

Author: 3 people

zebra-consensus/CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Breaking Changes
+
+- `transaction::Verifier::check_maturity_height` is now private and takes
+  `tx`, `height`, `network`, and `spent_utxos` directly instead of `&Request`.
+  ([#10843](https://github.com/ZcashFoundation/zebra/pull/10843))
+
 ## [12.0.0] - 2026-07-17
 
 ### Changed