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

Status: 60% complete, needs compilation fixes

PHASE_2.7_PROGRESS_SUMMARY.md

@@ -10,16 +10,15 @@
 ### Task 1: Medication Management (100% Complete)
 **Status:** ✅ DEPLOYED & TESTED
 
-**Features Implemented:**
-- ✅ 7 API endpoints fully functional
-- ✅ Database layer with repository pattern
-- ✅ Models (Medication, MedicationDose, MedicationReminder)
-- ✅ JWT authentication & ownership validation
-- ✅ Audit logging for all operations
-- ✅ Adherence tracking calculation
-- ✅ Comprehensive testing (100% pass rate)
+**Features:**
+- 7 API endpoints fully functional
+- Database layer with repository pattern
+- JWT authentication & ownership validation
+- Audit logging for all operations
+- Adherence tracking calculation
+- Comprehensive testing (100% pass rate)
 
-**Test Results:** ✅ All 10/10 tests passing
+**Test Results:** All 10/10 tests passing ✅
 
 ---
 
@@ -29,14 +28,14 @@
 **Status:** 🟡 IMPLEMENTATION IN PROGRESS
 
 **What's Done:**
-- ✅ HealthStatistics model with 10 stat types
-- ✅ HealthStatisticsRepository
-- ✅ 6 API endpoints defined
-- ✅ Trend analysis with summary calculations
+- HealthStatistics model with 10 stat types
+- HealthStatisticsRepository
+- 6 API endpoints defined
+- Trend analysis with summary calculations
 
 **What's Left:**
-- ⚠️ Fix compilation errors
-- ⚠️ Testing and deployment
+- Fix compilation errors
+- Testing and deployment
 
 ---
 
@@ -50,10 +49,10 @@
 
 ## 🎯 Next Steps
 
-1. Complete Health Statistics (remaining 40%)
+1. Complete Health Statistics
 2. Implement Profile Management
 3. Notification System
 
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-**Last Updated:** 2026-03-07 16:23 UTC
+**Last Updated:** 2026-03-07 16:24 UTC