Validator History: Fix gossip version

[aoikurokawa]

• solana-version introduced v4
  https://github.com/anza-xyz/agave/blob/master/version/src/v4.rs

[Copilot]

Pull request overview

Updates validator-history’s gossip Version deserialization to match Agave/Solana v4’s packed minor/prerelease wire format, preventing prerelease versions (e.g., 4.0.0-rc.1) from being misrecorded on-chain. Also adds a small CLI “info” subcommand to report the number of ValidatorHistory accounts.

Changes:

• Implement Agave v4-compatible Version (de)serialization using a packed-minor wrapper and add unit tests for stable vs prerelease encodings.
• Add InfoValidatorHistoryCount CLI subcommand and wire it into the validator-history CLI command tree.
• Introduce a new commands::info module for CLI “info” commands.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
utils/validator-history-cli/src/main.rs	Wires a new InfoValidatorHistoryCount subcommand into the CLI.
utils/validator-history-cli/src/commands/mod.rs	Exposes the new info commands module.
utils/validator-history-cli/src/commands/info/mod.rs	Adds the info module entrypoint.
utils/validator-history-cli/src/commands/info/validator_history_count.rs	Implements the on-chain ValidatorHistory account counting command with optional JSON output.
programs/validator-history/src/crds_value.rs	Fixes gossip Version wire decoding for Agave v4 packed-minor prerelease format; adds focused unit tests.

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[ebatsell]

could we get an integration test on this instruction that uses the 4.0.0-rc.1 version as input in the format we're getting from gossip as a ContactInfo?

[aoikurokawa]

They bring new tag (prerelease tag) which is not stored in Validator History account.
We will keep tracking of only major, minor and patch only.