feat: dashboard shows the live model version; DB stats count openmeteo_rain

The flood-outlook subtitle now reads '... · model hgb-v3+<sha> (trained
<date>)' from the forecast rows, so the deployed model is always visible
on the page. /api/stats adds openmeteo_rain_measurements (guarded — the
table may not exist on older DBs) to the whole-DB total, and the
Total-datapoints tile note gains a 'forecast rain' entry.

src/static/dashboard.html

@@ -1283,8 +1283,13 @@
                 grid.appendChild(cardEl);
             });
             const asOf = rows[0].as_of ? new Date(rows[0].as_of).toLocaleString([], { dateStyle: 'medium', timeStyle: 'short' }) : null;
+            const modelRow = rows.find((r) => r.source === 'model');
+            const trainedAt = modelRow?.trained_at ? new Date(modelRow.trained_at).toLocaleDateString([], { day: 'numeric', month: 'short' }) : null;
+            const modelInfo = modelRow?.model_version
+                ? ` · model ${modelRow.model_version}${trainedAt ? ` (trained ${trainedAt})` : ''}`
+                : '';
             $('forecast-status').textContent = `Probability of exceeding warning / danger level within 6, 12 and 24 h` +
-                (asOf ? ` · based on readings up to ${asOf}` : '');
+                (asOf ? ` · based on readings up to ${asOf}` : '') + modelInfo;
             // Only the P.1 city outlook is shown by default; the per-station
             // grid stays collapsed behind the expander.
             const expand = $('forecast-expand');
@@ -1311,7 +1316,10 @@
             $('db-total').textContent = Number(stats.total_measurements).toLocaleString();
             if (stats.rid_measurements != null) {
                 const fmtNum = (value) => Number(value || 0).toLocaleString();
-                $('db-total-note').textContent = `${fmtNum(stats.rid_measurements)} RID · ${fmtNum(stats.hii_waterlevel_measurements)} HII level · ${fmtNum(stats.hii_rainfall_measurements)} rain`;
+                const openmeteo = stats.openmeteo_rain_measurements
+                    ? ` · ${fmtNum(stats.openmeteo_rain_measurements)} forecast rain`
+                    : '';
+                $('db-total-note').textContent = `${fmtNum(stats.rid_measurements)} RID · ${fmtNum(stats.hii_waterlevel_measurements)} HII level · ${fmtNum(stats.hii_rainfall_measurements)} rain${openmeteo}`;
                 $('db-stations-note').textContent = `${stats.rid_station_count} RID · ${stats.hii_station_count} ThaiWater/HII`;
             }
             $('db-range').textContent = `${fmtDate(stats.first_timestamp)} – ${fmtDate(stats.last_timestamp)}`;

src/web_api.py

@@ -1222,6 +1222,22 @@ async def get_database_stats():
         except Exception as e:
             logger.warning(f"HII stats unavailable: {e}")
 
+        openmeteo_n = 0
+        try:  # table appears with the 2026-08 rain work; older DBs lack it
+            engine = _hii_engine()
+            if engine is not None:
+                from sqlalchemy import text as _text
+
+                with engine.connect() as conn:
+                    openmeteo_n = int(
+                        conn.execute(
+                            _text("SELECT COUNT(*) FROM openmeteo_rain")
+                        ).scalar()
+                        or 0
+                    )
+        except Exception:
+            pass
+
         def as_dt(value):
             if isinstance(value, str):
                 return datetime.fromisoformat(value)
@@ -1241,11 +1257,15 @@ async def get_database_stats():
                     last_ts = hi
 
         return {
-            # Whole-DB totals (RID + HII feeds); breakdown fields alongside
+            # Whole-DB totals (RID + HII + Open-Meteo); breakdown alongside
-            "total_measurements": stats["total_measurements"] + rain_n + wl_n,
+            "total_measurements": stats["total_measurements"]
+            + rain_n
+            + wl_n
+            + openmeteo_n,
             "rid_measurements": stats["total_measurements"],
             "hii_rainfall_measurements": rain_n,
             "hii_waterlevel_measurements": wl_n,
+            "openmeteo_rain_measurements": openmeteo_n,
             "station_count": stats["station_count"] + hii_stations,
             "rid_station_count": stats["station_count"],
             "hii_station_count": hii_stations,