Merge branch 'feat/business-rules-evaluate' into feat/business-rules-run

Brings in #1912's renames and applies them to the debug path too:
_run_spec(run_target, rule_input, ...), _debug_evaluate_spec(rule_name,
rule_input, ...) with request_body, _RunTarget(rule_name, ...,
debug_job_key), and debug_job_key in _resolve_debug_job_key. The debug
tests use the renamed _service_response / _single_decision_result helpers,
whose local is now response_body. No behaviour change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: ashishupadhyay88