chore: Second cleanup wave - organize root directory

- Archive: 85 agent .txt files → docs/archive/agents/legacy_txt/
- Scripts: Move 110 shell scripts → scripts/ (keep deploy.sh in root)
- Models: Move 18 .safetensors → ml/models/checkpoints/training_artifacts/
- Delete: 34 directories (~33GB freed) - target/, coverage_*, test artifacts
- Build: Clean 14 build artifacts (.rlib, .o, .pid, binaries)
- Tests: Move 14 .rs files → tests/standalone/
- SQL: Move 5 files → sql/ (keep init-db*.sql for Docker)
- Wave 153: Archive to docs/archive/historical/wave153/
- Docs: Archive 9 markdown files to wave_d/reports/ and historical/

Total impact: ~34GB freed (both waves), root directory cleaned from 583 to ~40 essential files
Directory count reduced from 65 to 31 (52% reduction)
All historical data preserved in organized archive structure

scripts/stop.sh

@@ -0,0 +1,86 @@
+#!/bin/bash
+# Foxhunt HFT Trading System - Complete System Shutdown
+# Stops 3 standalone services + databases as per TLI_PLAN.md architecture
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+echo -e "${RED}🛑 Stopping Foxhunt HFT Trading System${NC}"
+echo "================================================="
+echo "Shutting down: 3 Services + Docker Databases"
+
+# Step 1: Stop services by PID files if they exist
+echo -e "${BLUE}🔌 Stopping standalone services...${NC}"
+
+if [ -f .trading_service.pid ]; then
+    TRADING_PID=$(cat .trading_service.pid)
+    echo "📈 Stopping Trading Service (PID: $TRADING_PID)"
+    kill $TRADING_PID 2>/dev/null || true
+    rm -f .trading_service.pid
+fi
+
+if [ -f .backtesting_service.pid ]; then
+    BACKTEST_PID=$(cat .backtesting_service.pid)
+    echo "🔄 Stopping Backtesting Service (PID: $BACKTEST_PID)"
+    kill $BACKTEST_PID 2>/dev/null || true
+    rm -f .backtesting_service.pid
+fi
+
+if [ -f .ml_training_service.pid ]; then
+    ML_PID=$(cat .ml_training_service.pid)
+    echo "🧠 Stopping ML Training Service (PID: $ML_PID)"
+    kill $ML_PID 2>/dev/null || true
+    rm -f .ml_training_service.pid
+fi
+
+# Step 2: Fallback - kill by process name
+echo -e "${YELLOW}🧹 Cleaning up any remaining service processes...${NC}"
+pkill -f "trading_service" || true
+pkill -f "backtesting_service" || true
+pkill -f "ml_training_service" || true
+
+# Give processes time to shut down gracefully
+sleep 2
+
+# Step 3: Stop Docker databases
+echo -e "${BLUE}🗄️  Stopping Docker databases...${NC}"
+
+# Use docker compose (newer) or docker-compose (older)
+DOCKER_COMPOSE_CMD="docker compose"
+if ! command -v docker >/dev/null 2>&1 || ! docker compose version >/dev/null 2>&1; then
+    DOCKER_COMPOSE_CMD="docker-compose"
+fi
+
+if command -v docker >/dev/null 2>&1; then
+    echo "Stopping databases with $DOCKER_COMPOSE_CMD..."
+    $DOCKER_COMPOSE_CMD down
+
+    # Optional: Remove volumes (uncomment to completely clean databases)
+    # echo -e "${YELLOW}⚠️ Removing database volumes (data will be lost)...${NC}"
+    # docker volume rm foxhunt_postgres_data foxhunt_influxdb_data foxhunt_redis_data 2>/dev/null || true
+else
+    echo -e "${YELLOW}⚠️ Docker not found, skipping database shutdown${NC}"
+fi
+
+# Step 4: Clean up any remaining ports
+echo -e "${YELLOW}🔍 Checking for services still using ports...${NC}"
+for port in 50051 50052 50053; do
+    PID=$(lsof -ti :$port 2>/dev/null || true)
+    if [ ! -z "$PID" ]; then
+        echo "⚠️ Force killing process $PID on port $port"
+        kill -9 $PID 2>/dev/null || true
+    fi
+done
+
+echo -e "${GREEN}✅ All services and databases stopped${NC}"
+echo ""
+echo "System components stopped:"
+echo "├── Trading Service (port 50051)"
+echo "├── Backtesting Service (port 50052)"
+echo "├── ML Training Service (port 50053)"
+echo "└── Databases (PostgreSQL, InfluxDB, Redis)"
+echo ""
+echo -e "${GREEN}System shutdown complete${NC}"