Updates for Simplex implementation

[bvscd]

No description provided.

[Copilot]

Pull request overview

This pull request implements major updates to the Simplex consensus protocol implementation, transitioning from a get_committed_candidate callback-based approach to a finalized-driven delivery model via on_block_finalized(). The changes affect multiple layers of the validator infrastructure including listener interfaces, session management, and network context handling.

Changes:

• Replace get_committed_candidate with on_block_finalized callback for finalized block delivery
• Implement OnAppliedTop action type for spreading MC-applied-top information to simplex sessions
• Refactor validator list network readiness tracking from network_ready flag to context-based checking
• Remove RestartRecommitStrategy enum and simplify startup recovery
• Update ValidatorListOutcome to remove network_ready field and check context separately
• Add extensive simplex state refactoring and timing fixes
• Implement standstill recovery and egress budget management

Reviewed changes

Copilot reviewed 41 out of 43 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/node/src/validator/validator_session_listener.rs	Replaces OnGetCommittedCandidate with OnAppliedTop and OnBlockFinalized enum variants and implements corresponding handler
src/node/src/validator/validator_manager.rs	Refactors validator list network readiness tracking; updates notify_simplex_sessions_applied_tops function; implements applied-top-based session management
src/node/src/validator/validator_group.rs	Adds on_block_finalized method for out-of-order finalized block delivery; adds test for sync_last_accepted_mc_seqno_from_applied_top
src/node/src/validator/consensus.rs	Updates notify_mc_finalized to use BlockIdExt instead of seqno; removes CommittedBlockProof imports
src/node/src/network/node_network.rs	Adds resolve_validator_adnl_key method; updates overlay peer addition logic; adds has_validator_list_context method
src/node/src/engine_traits.rs	Removes network_ready field from ValidatorListOutcome; adds has_validator_list_context method to PrivateOverlayOperations
src/node/simplex/src/lib.rs	Removes RestartRecommitStrategy enum; updates on_block_finalized documentation throughout
Simplex tests	Updates test listeners to implement on_block_finalized instead of old callback paths; refactors seqno tracking

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[LenyKholodov]

LGTM