AC_BROKEN: text-003-regex-conformance, text-003-captures

RESULT: SUCCESS

FILES CHANGED:
- jq_interpreter/evaluator.py
- jq_interpreter/parser.py
- tests/test_text_003_regex.py

SUMMARY:
Regex implementation and tests pass: `pytest -q` reports 167 passed. Both acceptance selectors match zero cases because the staged corpus contains no regex programs.

BLOCKERS:
- The staged `sources/jq.test` must include regex cases, or the selectors must be corrected in the specification.