refactor(backend)!: separate algorithm and data layers

Reorganize algorithm packages by business responsibility, move orchestration into services, and keep database access behind pooled repositories.

Harden analysis API validation, remove unsafe legacy simulation endpoints, and add regression and architecture boundary coverage.

BREAKING CHANGE: legacy algorithm module paths and obsolete simulation endpoints are removed.

app/services/burst_detection.py

@@ -8,13 +8,13 @@ from uuid import UUID
 import numpy as np
 import pandas as pd
 
-from app.algorithms.burst_detection.burst_detector import BurstDetector
+from app.algorithms.burst_detection.pressure_anomaly import PressureAnomalyDetector
+from app.infra.db.postgresql.scada import get_all_scada_info
 from app.infra.db.timescaledb.internal_queries import InternalQueries
 from app.services.scheme_management import (
     store_scheme_info,
 )
-from app.services.tjnetwork import get_all_scada_info
-from app.services.time_api import parse_utc_time, utc_now
+from app.domain.time import parse_utc_time, utc_now
 
 
 TARGET_DAY_COUNT = 15
@@ -178,7 +178,7 @@ def run_burst_detection(
         observed_input = observed_pressure_data
         observed_source = "request_payload"
 
-    detector = BurstDetector(
+    detector = PressureAnomalyDetector(
         mu=mu,
         points_per_day=points_per_day,
         iforest_params=iforest_params,