The default lint-rule runner passed check.target as BOTH the --rule id and the
eslint path, so it could never pass (eslint tried to lint a file named after the
rule). Add a distinct check.rule field (rule id) vs check.target (path to lint),
extract a pure exported buildLintArgs() so the mapping is mutation-testable
without spawning eslint, fail-closed on a lint-rule missing its rule id, and carry
the rule into enforcement evidence. Updates verify-phase descriptor docs.
676436258a