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/Services/EmailApiEmailSender.cs

@@ -239,4 +239,7 @@ public sealed class EmailApiEmailSender : IEmailSender
         _emailTemplates.Render("email.match.subject", language,
             ("score", score.ToString()),
             ("jobLabel", jobLabel ?? "Job"));
+
+    public string GetManualJobLabel(string language) =>
+        _emailTemplates.Get("email.match.manual-job-label", language);
 }