feat: Add High Availability setup roadmap and scripts

Created comprehensive HA roadmap with 6 phases:
- Phase 1: Warm standby (CURRENT - manual failover)
- Phase 2: Database replication
- Phase 3: Health monitoring
- Phase 4: Reverse proxy + floating IP
- Phase 5: Automated failover
- Phase 6: Geographic redundancy

Includes:
- Decision gates based on capital and stability
- Cost-benefit analysis
- Scripts for healthcheck, failover, DB sync
- Recommendation to defer full HA until capital > $5k

Secondary server ready at 72.62.39.24 for emergency manual failover.

Related: User concern about system uptime, but full HA complexity
not justified at current scale (~$600 capital). Revisit in Q1 2026.

ha-setup/healthcheck.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+#
+# Trading Bot Health Check Script
+# Checks if trading bot is healthy and responding
+#
+# Usage: ./healthcheck.sh
+# Exit codes: 0 = healthy, 1 = unhealthy
+
+set -eu
+
+TRADING_BOT_HOST="${TRADING_BOT_HOST:-localhost:3001}"
+MAX_FAILURES="${MAX_FAILURES:-3}"
+CHECK_INTERVAL="${CHECK_INTERVAL:-10}"
+
+# Source API key from .env
+if [ -f "/home/icke/traderv4/.env" ]; then
+  export $(grep "^API_SECRET_KEY=" /home/icke/traderv4/.env | xargs)
+fi
+
+log() {
+  echo "[$(date +'%Y-%m-%d %H:%M:%S')] $*"
+}
+
+# Check if container is running
+check_container() {
+  docker ps --filter "name=trading-bot-v4" --filter "status=running" | grep -q "trading-bot-v4"
+  return $?
+}
+
+# Check if API is responding
+check_api() {
+  local response
+  response=$(curl -s -f -m 5 \
+    -H "Authorization: Bearer ${API_SECRET_KEY}" \
+    "http://${TRADING_BOT_HOST}/api/drift/account-summary" 2>&1)
+  
+  if [ $? -eq 0 ] && echo "$response" | grep -q '"success":true'; then
+    return 0
+  else
+    return 1
+  fi
+}
+
+# Check if Position Manager is monitoring (if positions exist)
+check_position_manager() {
+  local logs
+  logs=$(docker logs --tail=50 trading-bot-v4 2>&1)
+  
+  # Check for recent monitoring activity (within last 30 seconds)
+  if echo "$logs" | grep -q "🔍 Monitoring"; then
+    return 0
+  fi
+  
+  # If no monitoring logs but no positions open, that's OK
+  if echo "$logs" | grep -q "No positions to monitor"; then
+    return 0
+  fi
+  
+  # If container just started (less than 1 min), give it time
+  if docker inspect trading-bot-v4 --format='{{.State.StartedAt}}' | grep -q "$(date -u +%Y-%m-%dT%H)"; then
+    return 0
+  fi
+  
+  return 1
+}
+
+# Main health check
+main() {
+  log "Starting health check..."
+  
+  if ! check_container; then
+    log "❌ UNHEALTHY: Container not running"
+    exit 1
+  fi
+  
+  if ! check_api; then
+    log "❌ UNHEALTHY: API not responding"
+    exit 1
+  fi
+  
+  if ! check_position_manager; then
+    log "⚠️  WARNING: Position Manager may not be monitoring (check logs)"
+    # Don't fail on this - API working is primary health indicator
+  fi
+  
+  log "✅ HEALTHY: All checks passed"
+  exit 0
+}
+
+main "$@"