feat: 宠物加性格/过敏/备注字段 + 身份卡照护信息 + 微信取手机号

- Pet 增 personality/allergy/notes；建档表单加「性格标签(多选)/过敏/备注」
- IDCard 增 color/personality/owner/phone(脱敏)/allergy/notes/疫苗驱虫状态/发证机构
- 微信取手机号：POST /api/user/phone 用 getPhoneNumber 的 code 换手机号存库
  (BindPhoneByCode 走 getuserphonenumber，复用 access_token)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

pets-be/internal/handler/auth.go

@@ -210,3 +210,20 @@ func (h *Handler) UpdateProfile(c *gin.Context) {
 	}
 	response.OK(c, user)
 }
+
+// BindPhone POST /api/user/phone  用小程序 getPhoneNumber 的 code 绑定手机号
+func (h *Handler) BindPhone(c *gin.Context) {
+	var req struct {
+		Code string `json:"code"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil || req.Code == "" {
+		response.FailParams(c, "缺少 code")
+		return
+	}
+	phone, err := h.svc.BindPhoneByCode(middleware.UserID(c), req.Code)
+	if err != nil {
+		response.FailErr(c, err)
+		return
+	}
+	response.OK(c, gin.H{"phone": phone})
+}