[verified] Generalize BOT regional header detection (BE year 25XX); only enable regions with real data

- header month-cell detection now matches any 4-digit BE year (25XX) not just 256X
- northeast reportID 955 disabled: returns 0.0 BE-2570 placeholder page, no real data yet (documented)
- north 954 stays enabled (live idx 100.3); tests + full suite 152 OK

backend/app/bot_regional.py

@@ -32,7 +32,11 @@ _USER_AGENT = (
 )
 _BASE_URL = "https://app.bot.or.th/BTWS_STAT/statistics/ReportPage.aspx?reportID="
 
-# Default mapping of BOT regions; extend as other reportIDs are confirmed.
+# Default mapping of BOT regions (BTWS_STAT regional consumption reports).
+# Only regions with REAL published values are enabled. north (RG_NR_042, 954)
+# is confirmed live (idx 100.3). northeast (RG_NE_044, 955) currently returns a
+# 0.0 placeholder (BE 2570 forecast page, no real data yet) so it is NOT enabled
+# until BOT publishes real values. south/central reportIDs pending confirmation.
 REGION_REPORT_IDS: dict[str, int] = {
     "north": 954,
 }
@@ -112,9 +116,9 @@ def parse_bot_regional_html(html_text: str) -> dict:
             if not cells:
                 continue
             # header row: month labels (e.g. 'มิ.ย. 2569 p') — keep only cells
-            # whose text carries a Thai month + Buddhist year (256X).
-            if "256" in " ".join(cells) and not re.search(r"\d\.\d", " ".join(cells)):
-                # keep only cells carrying a 4-digit BE year (256X) — drops
+            # carrying a 4-digit BE year (25XX, may be 2569/2570/...).
+            if re.search(r"25\d\d", " ".join(cells)) and not re.search(r"\d\.\d", " ".join(cells)):
+                # keep only cells carrying a 4-digit BE year (25XX) — drops
                 # column titles like 'ลำดับ' / 'รายการ'.
                 month_cells = [c for c in cells if re.search(r"25\d\d", c)]
                 if month_cells: