Fix props page hang: reduce build timeout to 5s, fix st.session_state in cache, async log

- Reduce _FALLBACK_BUILD_TIMEOUT_SECONDS from 40s to 5s: users now wait
max 5s before content appears (vs 40s which appeared as a hang)
- Move st.session_state write out of @st .cache_data to render_props():
prevents StreamlitAPIException on newer Streamlit; use setdefault to
avoid resetting the reload timer on reruns
- Wrap _maybe_log_props() in threading.Thread with join(timeout=5): prevents
DB insert hang from blocking the render pipeline; logs still written
synchronously within 5s or fire-and-forget if DB is slow

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

data/shared_baseline.py

@@ -26,7 +26,7 @@ _MAX_ROWS_PER_PLAYER = 420
 _MIN_CURRENT_ROWS_WHEN_AVAILABLE = 20
 _SNAPSHOT_VERSION = "shared_baseline_v1"
 _DEFAULT_SNAPSHOT_MAX_AGE_SECONDS = 60 * 30
-_FALLBACK_BUILD_TIMEOUT_SECONDS: int = 40
+_FALLBACK_BUILD_TIMEOUT_SECONDS: int = 5
 _PRIOR_SEASON_RECENCY_WEIGHTS = {
     2025: 1.00,
     2024: 0.85,

visualization/props_page.py

@@ -679,9 +679,6 @@ def _load_props_prepared_bundle(
         max_age_seconds=60 * 60,
         persist_runtime_refresh=True,
     )
-    if bundle.get("snapshot_source_status") in ("runtime_fallback_timeout", "patch_build_timeout"):
-        import time as _time
-        st.session_state["props_baseline_reload_at"] = _time.time() + 80
     pitcher_statcast_df = bundle.get("blended_pitcher_df", pd.DataFrame())
     starter_bundle = _load_props_starter_bundle(
         raw=raw,
@@ -1991,6 +1988,8 @@ def render_props(
         probable_starters=probable_starters,
     )
     import time as _time
+    if prepared_bundle.get("snapshot_source_status") in ("runtime_fallback_timeout", "patch_build_timeout"):
+        st.session_state.setdefault("props_baseline_reload_at", _time.time() + 80)
     _reload_at = st.session_state.get("props_baseline_reload_at")
     if _reload_at:
         if _time.time() < _reload_at:
@@ -2062,7 +2061,9 @@ def render_props(
         st.info("No mappable HR prop rows." if market_type == "hr" else "No props available.")
         return
 
-    _maybe_log_props(conn, mapped)
+    _log_t = threading.Thread(target=_maybe_log_props, args=(conn, mapped.copy()), daemon=True)
+    _log_t.start()
+    _log_t.join(timeout=5)
 
     view_model = build_hr_props_view_model(mapped) if market_type == "hr" else None
     if view_model is not None: