fix(models): add alembic migration 009 for missing tables (v1.4.1)

Migration adds tables that existed in models/ but were never
included in alembic history:
- ai_ops: device_health_scores, anomaly_detections, diagnostic_reports,
  maintenance_predictions, ops_insights
- energy_strategy: tou_pricing, tou_pricing_periods, energy_strategies,
  strategy_executions, monthly_cost_reports
- weather: weather_data, weather_config
- prediction: prediction_tasks, prediction_results, optimization_schedules

Without this migration, fresh deploys would 500 on these endpoints:
- /api/v1/ai-ops/health, /ai-ops/dashboard
- /api/v1/strategy/pricing
- /api/v1/prediction/forecast
- /api/v1/weather/current

Discovered during Z-Park demo deployment on xie_openclaw1.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

VERSIONS.json

@@ -1,6 +1,6 @@
 {
   "project": "ems-core",
-  "project_version": "1.4.0",
+  "project_version": "1.4.1",
   "last_updated": "2026-04-06",
-  "notes": "Version API, solar KPI endpoint (PR, equiv hours, revenue, self-consumption)"
+  "notes": "Add alembic migration 009 for ai_ops/strategy/weather/prediction tables"
 }