fix(schema): escape TDengine 3.4 reserved words 'value'/'label' and use column alias for ANOMALY_WINDOW

- schema: rename label -> is_anomaly, escape `value` as backtick
- detection/forecast: wrap subquery with SELECT ts, `value` AS v
  so ANOMALY_WINDOW/FORECAST receive non-keyword column name
- resolves [0x2600] syntax error and unblocks E2E pipeline on community tsdb 3.4.1

ts_anomaly_td/detection.py

@@ -28,8 +28,8 @@ def run_anomaly_window(conn, stable: str, algo: str) -> list[tuple[int, int]]:
 
     sql = (
         f"SELECT _WSTART, _WEND "
-        f"FROM (ANOMALY_WINDOW(value, \"algo={algo}\") "
-        f"FROM ds_{stable})"
+        f"FROM (SELECT ts, `value` AS v FROM ds_{stable}) "
+        f"ANOMALY_WINDOW(v, 'algo={algo}')"
     )
 
     rows = conn.execute(sql)

ts_anomaly_td/forecast.py

@@ -38,8 +38,8 @@ def run_forecast(
     """
     sql = (
         f"SELECT _FROWTS, _FLOW, _FHIGH "
-        f"FROM (FORECAST(value, \"algo={algo},rows={rows},conf={conf}\") "
-        f"FROM ds_{stable})"
+        f"FROM (SELECT ts, `value` AS v FROM ds_{stable}) "
+        f"FORECAST(v, 'algo={algo},rows={rows},conf={conf}')"
     )
     try:
         raw = conn.execute(sql)
@@ -83,7 +83,7 @@ def forecast_anomaly(
     start_ts = min(frowtses)
     end_ts = max(frowtses)
 
-    sql = f"SELECT ts, value FROM s_{stable} WHERE ts >= {start_ts} AND ts <= {end_ts}"
+    sql = f"SELECT ts, `value` FROM s_{stable} WHERE ts >= {start_ts} AND ts <= {end_ts}"
     raw = conn.execute(sql)
 
     fmap = {f[0]: (f[1], f[2]) for f in forecasts}

ts_anomaly_td/schema.py

@@ -24,7 +24,7 @@ def create_supertable(conn, stable: str) -> None:
     """
     sql = (
         f"CREATE STABLE IF NOT EXISTS ds_{stable} "
-        f"(ts TIMESTAMP, value DOUBLE, label INT) "
+        f"(ts TIMESTAMP, `value` DOUBLE, is_anomaly INT) "
         f"TAGS (series_id INT)"
     )
     conn.execute_no_result(sql)