Records what commit 2bfb1ab actually changed and its scope, matching the
status-blockquote convention already used for Issues 1 and 2.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
A typo like `n_res_block` for `n_res_blocks` previously merged cleanly,
passed validate_config, and silently trained a model that didn't match
config.toml's documented settings. merge_cli_overrides now rejects any
key not present in DEFAULT_CONFIG's schema via validate_config_keys,
with a did-you-mean suggestion, while still allowing the genuinely
dynamic composed-router axis keys and centers_init. Checkpoint
model_config loading is untouched, so old checkpoints keep loading.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>