key generate-node-key

[turuslan]

• closes Node key generator #15

[kamilsa]

Maybe also rename lean_node to qlean?

[Copilot]

Pull Request Overview

Adds a new CLI subcommand to generate a node key and fixes a minor log message typo.

• Introduces lean_node key generate-node-key to output a Secp256k1 private key (hex) and PeerId (Base58)
• Fixes grammar in a log line and updates help output to list the new command

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 7 comments.

File	Description
src/modules/production/production.cpp	Fixes a typo in a log message string
src/executable/lean_node.cpp	Wires a new CLI subcommand and minimal argument parsing helper
src/executable/cmd_key_generate_node_key.hpp	Implements the key generation command (secp256k1 + PeerId)
src/app/configurator.cpp	Updates help output to mention the new subcommand

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