feat: migrate Flask API to Go with JWT auth

internal/profile/model.go

@@ -0,0 +1,29 @@
+package profile
+
+import "time"
+
+type Equipment struct {
+	ID     uint      `gorm:"primaryKey" json:"id"`
+	UserID uint      `gorm:"not null;index" json:"user_id"`
+	Name   string    `gorm:"not null" json:"name"`
+	Type   string    `gorm:"not null" json:"type"` // "bike", "shoes", "helmet", etc.
+	Brand  string    `gorm:"default:''" json:"brand"`
+	Model  string    `gorm:"default:''" json:"model"`
+	Weight float64   `gorm:"default:0" json:"weight"` // grams
+	Notes  string    `gorm:"default:''" json:"notes"`
+	Active bool      `gorm:"default:true" json:"active"`
+	CreatedAt time.Time `json:"created_at"`
+	UpdatedAt time.Time `json:"updated_at"`
+}
+
+type Stats struct {
+	ID        uint      `gorm:"primaryKey" json:"id"`
+	UserID    uint      `gorm:"not null;uniqueIndex" json:"user_id"`
+	TotalRides    int   `gorm:"default:0" json:"total_rides"`
+	TotalDistance float64 `gorm:"default:0" json:"total_distance"`
+	TotalTime     int   `gorm:"default:0" json:"total_time"`
+	AverageSpeed  float64 `gorm:"default:0" json:"average_speed"`
+	MaxSpeed      float64 `gorm:"default:0" json:"max_speed"`
+	CreatedAt time.Time `json:"created_at"`
+	UpdatedAt time.Time `json:"updated_at"`
+}