feat: Support filtering txns by mpt_issuance_id

[PeterChen13579]

Adds an optional mpt_issuance_id field to Account_tx so that users can filter Account transactions if the transaction is involved in a specific mpt_issuance_id

[codecov]

Codecov Report

❌ Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/etl/MPTHelpers.cpp	87.50%	0 Missing and 1 partial ⚠️

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[Copilot]

Pull request overview

Adds support to filter account_tx results by a specific MPT issuance identifier, reusing ETL-side MPT parsing utilities to determine whether a transaction references an issuance.

Changes:

• Add optional mpt_issuance_id request parameter to account_tx (validated as uint192 hex).
• Implement issuance-reference detection via new etl::referencesMptIssuance helper and apply filtering in the handler.
• Extend unit tests with parameter validation cases and several filter scenarios (including binary output).

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/unit/rpc/handlers/AccountTxTests.cpp	Adds parameter-validation cases and new scenarios validating mpt_issuance_id filtering behavior.
src/rpc/handlers/MPTHolders.cpp	Adds an include needed for compilation after related MPT changes.
src/rpc/handlers/AccountTx.hpp	Introduces mpt_issuance_id into the RPC spec and Input struct.
src/rpc/handlers/AccountTx.cpp	Parses the new filter field and filters transactions using etl::referencesMptIssuance.
src/rpc/CMakeLists.txt	Links clio_rpc against clio_etl to use the new helper.
src/etl/MPTHelpers.hpp	Declares referencesMptIssuance helper for checking issuance references.
src/etl/MPTHelpers.cpp	Implements issuance-reference detection by scanning metadata nodes and tx fields.

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