Add support for additional validator nodes in example

[kamilsa]

No description provided.

[Copilot]

Pull request overview

This PR adds support for a 4th validator node (node_3) to the example network configuration, expanding it from a 3-validator to a 4-validator devnet.

Key changes:

• Added validator_3 configuration files (public key, node key, ENR record)
• Updated all existing validator keys (validator_0, validator_1, validator_2) with regenerated values
• Updated configuration files to reflect the 4-validator setup
• Enhanced README documentation with Node 3 startup instructions

Reviewed changes

Copilot reviewed 13 out of 17 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
example/1-network/genesis/validators.yaml	Reordered entries in reverse (node_3 to node_0) and added node_3 mapping
example/1-network/genesis/validator_3_pk.json	Added public key for the new 4th validator
example/1-network/genesis/validator_2_pk.json	Regenerated public key with new values
example/1-network/genesis/validator_1_pk.json	Regenerated public key with new values
example/1-network/genesis/validator_0_pk.json	Regenerated public key with new values
example/1-network/genesis/validator-keys-manifest.yaml	Updated validator count to 4, added validator_3 entry, and updated pubkey_hex values for all validators
example/1-network/genesis/nodes.yaml	Added 4th ENR record and updated existing ENR records for all nodes
example/1-network/genesis/node_3.key	Added node key for the new 4th node
example/1-network/genesis/node_2.key	Replaced with a new regenerated key value
example/1-network/genesis/node_1.key	Replaced with a new regenerated key value
example/1-network/genesis/node_0.key	Replaced with a new regenerated key value
example/1-network/genesis/config.yaml	Updated validator count to 4, added validator settings section with genesis validators list, and updated genesis timestamp
example/1-network/README.md	Updated title and descriptions to reflect 4-validator setup, added Node 3 startup command, and enhanced all node commands with additional flags

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[Copilot]

Trailing whitespace after "# Validator Settings" comment. Consider removing the trailing space for consistency.

Suggested change

	# Validator Settings
	# Validator Settings