feat: implement health statistics tracking (Phase 2.7 Task 2)

- Add HealthStatistics model with 10 stat types
- Implement HealthStatisticsRepository
- Create 6 health stats API endpoints
- Add trend analysis with summary calculations
- Follow medication repository pattern

Status: 60% complete, needs compilation fixes

test-medication-api.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+API_URL="http://solaria.solivarez.com.ar:8001"
+
+echo "Testing Medication Management API"
+echo "=================================="
+
+echo ""
+echo "1. Health Check"
+curl -s "$API_URL/health"
+echo ""
+
+echo ""
+echo "2. Register User"
+REGISTER=$(curl -s -X POST "$API_URL/api/auth/register" \
+  -H "Content-Type: application/json" \
+  -d '{"email":"med-test@example.com","username":"medtest","password":"SecurePass123!","first_name":"Test","last_name":"User"}')
+echo "$REGISTER"
+
+echo ""
+echo "3. Login"
+LOGIN=$(curl -s -X POST "$API_URL/api/auth/login" \
+  -H "Content-Type: application/json" \
+  -d '{"email":"med-test@example.com","password":"SecurePass123!"}')
+echo "$LOGIN"
+
+TOKEN=$(echo "$LOGIN" | grep -o '"access_token":"[^"]*' | cut -d'"' -f4)
+echo ""
+echo "Token obtained"
+
+echo ""
+echo "4. Create Medication"
+CREATE=$(curl -s -X POST "$API_URL/api/medications" \
+  -H "Content-Type: application/json" \
+  -H "Authorization: Bearer $TOKEN" \
+  -d '{"profile_id":null,"medication_name":"Lisinopril","dosage":"10mg","frequency":"once_daily","instructions":"Take with breakfast"}')
+echo "$CREATE"
+
+echo ""
+echo "5. List Medications"
+curl -s -X GET "$API_URL/api/medications" \
+  -H "Authorization: Bearer $TOKEN"
+echo ""
+
+echo ""
+echo "Tests complete!"