debug: add detailed logging for Telegram inquiry notifications

- Add debug logging to Contact page form handler
- Add detailed logging to TelegramInquiryNotificationService
- Track inquiry submission and notification flow

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/TaxBaik.Web/Pages/Contact.cshtml.cs

@@ -7,6 +7,7 @@ namespace TaxBaik.Web.Pages;
 public class ContactModel : PageModel
 {
     private readonly InquiryService _inquiryService;
+    private readonly ILogger<ContactModel> _logger;
 
     [BindProperty]
     public string Name { get; set; } = "";
@@ -26,35 +27,45 @@ public class ContactModel : PageModel
     [BindProperty]
     public bool Agree { get; set; }
 
-    public ContactModel(InquiryService inquiryService)
+    public ContactModel(InquiryService inquiryService, ILogger<ContactModel> logger)
     {
         _inquiryService = inquiryService;
+        _logger = logger;
     }
 
     public async Task<IActionResult> OnPostAsync()
     {
+        _logger.LogInformation("[Contact] POST 요청 시작: Name={Name}, Phone={Phone}, Service={Service}", Name, Phone, ServiceType);
+
         if (!ModelState.IsValid || !Agree)
+        {
+            _logger.LogWarning("[Contact] 유효성 검사 실패 또는 동의 미체크");
             return Page();
+        }
 
         try
         {
-            await _inquiryService.SubmitAsync(
+            _logger.LogInformation("[Contact] SubmitAsync 호출 전");
+            var inquiryId = await _inquiryService.SubmitAsync(
                 Name,
                 Phone,
                 ServiceType,
                 Message,
                 Email,
                 HttpContext.Connection.RemoteIpAddress?.ToString());
+            _logger.LogInformation("[Contact] SubmitAsync 완료: InquiryId={Id}", inquiryId);
             TempData["Success"] = "상담 신청이 접수되었습니다. 빠른 시간 내에 연락드리겠습니다.";
             return RedirectToPage();
         }
         catch (ValidationException ex)
         {
+            _logger.LogWarning(ex, "[Contact] 유효성 검사 오류: {Message}", ex.Message);
             ModelState.AddModelError("", ex.Message);
             return Page();
         }
-        catch
+        catch (Exception ex)
         {
+            _logger.LogError(ex, "[Contact] 예외 발생");
             ModelState.AddModelError("", "시스템 오류가 발생했습니다. 잠시 후 다시 시도해주세요.");
             return Page();
         }

src/TaxBaik.Web/Services/TelegramInquiryNotificationService.cs

@@ -22,10 +22,16 @@ public class TelegramInquiryNotificationService : IInquiryNotificationService
 
     public async Task NotifyCreatedAsync(int inquiryId, string name, string phone, string serviceType, string message, string? ipAddress, DateTime createdAtUtc, CancellationToken ct = default)
     {
+        _logger.LogInformation("[Telegram] NotifyCreatedAsync 시작: InquiryId={Id}, Name={Name}", inquiryId, name);
+
         var botToken = _configuration["Telegram:BotToken"];
         var chatId = _configuration["Telegram:InquiryChatId"];
         if (string.IsNullOrWhiteSpace(chatId))
             chatId = _configuration["Telegram:ChatId"];
+
+        _logger.LogInformation("[Telegram] 설정 확인: BotToken={Token}, ChatId={ChatId}",
+            string.IsNullOrWhiteSpace(botToken) ? "없음" : "있음", chatId);
+
         if (string.IsNullOrWhiteSpace(botToken) || string.IsNullOrWhiteSpace(chatId))
         {
             _logger.LogWarning("텔레그램 새 문의 알림 설정이 누락되었습니다. Telegram:BotToken 또는 Telegram:InquiryChatId/ChatId를 확인하세요.");