fix(elections): source validator snapshot from current vset

[Keshoid]

Summary

• Bug: build_validators_snapshot sourced adnl, pubkey, key_id, key_election_id, key_expires_at, is_key_active, and stake from elections/bid data instead of the active validator set — showing stale or incorrect values when a node is validating AND has submitted a new election bid
• Fix: All vset-related snapshot fields now come from the current validator set (p34) and past_elections.frozen_map. Extended find_validator_entries to return the matched ValidatorEntry from the node's config. Fields are None when the node is not in the validator set.
• Tests: Added test_validator_snapshot_uses_vset_data and test_validator_snapshot_none_when_not_in_vset; updated existing test_publish_snapshot_validators

Closes SMA-79

[linear]

SMA-79 Validator snapshot uses ADNL address from current elections instead of current validator set

[Copilot]

Pull request overview

Fixes validator snapshot generation so vset-derived fields (pubkey/adnl/key metadata/stake) are sourced from the current validator set and past_elections.frozen_map, avoiding stale election/bid data when a node is validating while also submitting a new bid (SMA-79).

Changes:

• Update build_validators_snapshot to populate validator-related snapshot fields exclusively from the current vset (p34) + past_elections.frozen_map, returning None when the node is not in the vset.
• Extend find_validator_entries to return the matched ValidatorEntry (and associated election id) used to correlate node config with the vset.
• Add/adjust tests to verify vset sourcing and None behavior when not in vset.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/node-control/elections/src/runner.rs	Changes snapshot construction to use vset + frozen stake data; extends find_validator_entries return shape to carry matched config entry data.
src/node-control/elections/src/runner_tests.rs	Updates existing snapshot test expectations and adds new tests covering vset-sourced snapshot fields and None fields when not in vset.

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[Copilot]

In find_validator_entries, the exported public key is copied into a [u8; 32] using copy_from_slice earlier in the loop. If the provider returns a non-32-byte value, this will panic and crash snapshot building. Consider validating the length and returning an error (or skipping the entry with a warning) instead of panicking.