Retire dual storage mode and default runtime state to sqlite

src/analysis/deb_algorithm.py

@@ -7,7 +7,6 @@ from src.analysis.settlement_rounding import apply_city_settlement
 from loguru import logger
 from src.database.runtime_state import (
     DailyRecordRepository,
-    STATE_STORAGE_DUAL,
     STATE_STORAGE_SQLITE,
     TrainingFeatureRecordRepository,
     TruthRecordRepository,
@@ -79,7 +78,7 @@ def load_history(filepath):
             logger.error(f"Error loading daily records from sqlite, fallback to file: {e}")
 
     if not os.path.exists(filepath):
-        if mode == STATE_STORAGE_DUAL:
+        if mode == STATE_STORAGE_SQLITE:
             try:
                 data = _daily_record_repo.load_all()
                 _history_cache = data
@@ -113,13 +112,12 @@ def save_history(filepath, data):
     _history_cache = data
     mode = get_state_storage_mode()
 
-    if mode in {STATE_STORAGE_DUAL, STATE_STORAGE_SQLITE}:
+    if mode == STATE_STORAGE_SQLITE:
         try:
             _daily_record_repo.replace_all(data)
         except Exception as e:
             logger.error(f"Error saving daily records to sqlite: {e}")
-            if mode == STATE_STORAGE_SQLITE:
-                return
+            return
 
     if mode == STATE_STORAGE_SQLITE:
         return
@@ -891,15 +889,14 @@ def update_daily_record(
         for d in old_dates:
             del data[city][d]
 
-    if mode in {STATE_STORAGE_DUAL, STATE_STORAGE_SQLITE}:
+    if mode == STATE_STORAGE_SQLITE:
         try:
             _daily_record_repo.upsert_record(city_name, date_str, existing)
             cutoff = (datetime.now() - timedelta(days=14)).strftime("%Y-%m-%d")
             _daily_record_repo.delete_older_than(cutoff)
         except Exception as e:
             logger.error(f"Error upserting daily record to sqlite city={city_name} date={date_str}: {e}")
-            if mode == STATE_STORAGE_SQLITE:
-                raise
+            raise
 
     if mode != STATE_STORAGE_SQLITE:
         save_history(history_file, data)

src/analysis/probability_snapshot_archive.py

@@ -7,7 +7,6 @@ from typing import Any, Dict, List, Optional
 
 from src.database.runtime_state import (
     ProbabilitySnapshotRepository,
-    STATE_STORAGE_DUAL,
     STATE_STORAGE_SQLITE,
     TrainingFeatureRecordRepository,
     get_state_storage_mode,
@@ -105,7 +104,7 @@ def load_snapshot_rows_for_day(
     root_dir = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
     path = archive_path or os.path.join(root_dir, "data", "probability_training_snapshots.jsonl")
     if not os.path.exists(path):
-        if mode == STATE_STORAGE_DUAL:
+        if mode == STATE_STORAGE_SQLITE:
             return _snapshot_repo.load_rows_by_city_date(city_key, date_key)
         return []
 
@@ -260,7 +259,7 @@ def append_probability_snapshot(
         return
 
     mode = get_state_storage_mode()
-    if mode in {STATE_STORAGE_DUAL, STATE_STORAGE_SQLITE}:
+    if mode == STATE_STORAGE_SQLITE:
         _snapshot_repo.append_snapshot(payload)
         _training_feature_repo.upsert_record(
             city_key,