v0.1.3 - public truth sync

Maintenance evidence release for the Codex for OSS application.\n\n- Truth-synced README and frontend copy so Tavily is presented as public-v1 roadmap/live-with-fallback work, not current backend behavior.\n- Clarified current claim verification as deterministic offline/fixture-backed.\n- Clarified Overmind as optional export while local audit JSONL remains source of truth.\n- Preserved green public gates: CI, CodeQL, frontend audit/lint/build, backend tests, and seed eval.