Fix language consistency in job search and match emails

1. Pass session.Language to MatchJobRequest in cv-search-job so the LLM
   uses the correct language-specific prompt for job titles and summaries.

2. Replace hardcoded "Manual job description" with a template-driven label
   (email.match.manual-job-label) seeded in English and Romanian, so the
   match email subject and Job row reflect the user's language.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Apis/api/Controllers/CvMatcherController.cs

@@ -172,7 +172,7 @@ public sealed class CvMatcherController : ControllerBase
             var attachmentPath = TryGetCachedCvPath(request.CvDocumentId);
             var jobLabel = !string.IsNullOrWhiteSpace(request.JobUrl)
                 ? request.JobUrl
-                : "Manual job description";
+                : _emailSender.GetManualJobLabel(language);
 
             var language = NormalizeLanguage(request.Language);