feat: extend equipment and workout models with service tracking

internal/integration/model.go

@@ -0,0 +1,35 @@
+package integration
+
+import "time"
+
+type OAuthConnection struct {
+	ID             uint      `gorm:"primaryKey" json:"id"`
+	UserID         uint      `gorm:"not null;uniqueIndex:idx_user_provider" json:"user_id"`
+	Provider       string    `gorm:"not null;uniqueIndex:idx_user_provider" json:"provider"` // "garmin", "wahoo"
+	AccessToken    string    `gorm:"not null" json:"-"`
+	RefreshToken   string    `gorm:"default:''" json:"-"`
+	TokenExpiresAt time.Time `json:"token_expires_at"`
+	ProviderUserID string    `gorm:"default:''" json:"provider_user_id"`
+	Scopes         string    `gorm:"default:''" json:"scopes"`
+	Status         string    `gorm:"default:'active'" json:"status"` // "active", "revoked", "expired"
+	CreatedAt      time.Time `json:"created_at"`
+	UpdatedAt      time.Time `json:"updated_at"`
+}
+
+func (OAuthConnection) TableName() string {
+	return "oauth_connections"
+}
+
+type OAuthState struct {
+	ID           uint      `gorm:"primaryKey"`
+	State        string    `gorm:"uniqueIndex;not null"`
+	UserID       uint      `gorm:"not null"`
+	Provider     string    `gorm:"not null"` // "garmin", "wahoo"
+	CodeVerifier string    `gorm:"default:''"` // for PKCE (Garmin)
+	ExpiresAt    time.Time `gorm:"not null"`
+	CreatedAt    time.Time
+}
+
+func (OAuthState) TableName() string {
+	return "oauth_states"
+}