records: exclude indoor/treadmill/virtual sub_sport; rebuild athlete.json on bake

- fit.py: map FIT sub_sport 'treadmill' and 'virtual' to 'indoor'
- writer.py: broaden _is_outdoor to catch all indoor sub_sport variants
- render/cli.py: rebuild athlete.json from index.json on every bake so
  records never go stale when the exclusion logic changes

bincio/extract/writer.py

@@ -277,8 +277,10 @@ def write_athlete_json(summaries: list[dict], output_dir: Path, athlete_config:
                     best[d] = w
         return [[d, w] for d, w in sorted(best.items())]
 
+    _INDOOR_SUB_SPORTS = {"indoor", "treadmill", "virtual"}
+
     def _is_outdoor(s: dict) -> bool:
-        return s.get("sub_sport") != "indoor"
+        return s.get("sub_sport") not in _INDOOR_SUB_SPORTS
 
     all_mmps = [s["mmp"] for s in summaries if s.get("mmp") and _is_outdoor(s)]
     mmps_365 = [s["mmp"] for s in summaries if s.get("mmp") and _is_outdoor(s) and s["started_at"] >= cutoff_365]