refactor: update DMQ message structure

[jpraynaud]

Content

This PR includes the update of the DMQ implementation to:

• Support the new structure of the DmqMsg message in pallas
• Fix the implementation of the KES signature for a DMQ message
• Implementation the expiration of messages in the consumer server with the new expires_at field

Pre-submit checklist

• Branch
  • Tests are provided (if possible)
  • Crates versions are updated (if relevant)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • All check jobs of the CI have succeeded
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested
• Documentation
  • No new TODOs introduced

Issue(s)

Relates to #2670

[github-actions]

Test Results

    4 files  ±0    164 suites  ±0   23m 5s ⏱️ +30s
2 182 tests +1  2 182 ✅ +1  0 💤 ±0  0 ❌ ±0 
6 709 runs  +3  6 709 ✅ +3  0 💤 ±0  0 ❌ ±0 

Results for commit fee0ce1. ± Comparison against base commit 27753f4.

This pull request removes 1 and adds 2 tests. Note that renamed tests count towards both.

mithril-dmq ‑ consumer::server::queue::tests::enqueue_blocks_over_max_size_drains_oldest_messages

mithril-dmq ‑ consumer::server::queue::tests::queue_drains_expired_message
mithril-dmq ‑ consumer::server::queue::tests::queue_drains_oldest_messages_when_full

♻️ This comment has been updated with latest results.

[Copilot]

Pull Request Overview

Refactors the DMQ (Decentralized Message Queue) implementation to support the new structure of the DmqMsg message in pallas, including updates to KES signature implementation and message expiration handling.

• Updates the DmqMsg structure to use new pallas message format with separated payload and signature components
• Replaces block-based TTL with timestamp-based message expiration using expires_at field
• Modifies operational certificate handling to support separate cold verification key

Reviewed Changes

Copilot reviewed 18 out of 19 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
mithril-signer/src/runtime/runner.rs	Updates OpCert field access to use getter method
mithril-common/src/test/crypto_helper/cardano/kes/signer_fake.rs	Enhances fake KES signer to track signed messages for testing
mithril-common/src/crypto_helper/types/protocol_key.rs	Adds method to consume ProtocolKey and return inner key
mithril-common/src/crypto_helper/mod.rs	Exports new OpCertWithoutColdVerificationKey type
mithril-common/src/crypto_helper/codec/binary.rs	Adds binary codec support for OpCertWithoutColdVerificationKey
mithril-common/src/crypto_helper/cardano/opcert.rs	Restructures OpCert to separate cold verification key and adds getter methods
mithril-common/src/crypto_helper/cardano/key_certification.rs	Updates OpCert field access to use getter method
mithril-common/src/crypto_helper/cardano/kes/verifier_standard.rs	Updates OpCert field access to use getter methods
mithril-aggregator/src/services/signer_registration/verifier.rs	Updates OpCert field access to use getter method
internal/mithril-dmq/src/publisher/server/pallas.rs	Updates test to use new DmqMsg structure with separated payload
internal/mithril-dmq/src/model/timestamp.rs	Adds timestamp provider abstraction for Unix timestamps
internal/mithril-dmq/src/model/mod.rs	Exports new timestamp module
internal/mithril-dmq/src/model/message.rs	Updates tests to use new DmqMsg structure
internal/mithril-dmq/src/model/builder.rs	Refactors message builder to use timestamp-based expiration and new signing approach
internal/mithril-dmq/src/consumer/server/queue.rs	Implements message expiration based on timestamps and adds queue cleaning logic
internal/mithril-dmq/src/consumer/server/pallas.rs	Updates tests to use new DmqMsg structure
internal/mithril-dmq/src/consumer/client/pallas.rs	Updates client to parse separated operational certificate and cold verification key
internal/mithril-dmq/Cargo.toml	Updates pallas dependencies to use updated branch with new DMQ message structure

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[turmelclem]

LGTM 👍