feat: persist job source and market

JobTrackerApi/Services/JobImport/Plugins/FinnPlugin.cs

@@ -21,6 +21,8 @@ public sealed class FinnPlugin : IJobSitePlugin
             Location = meta.TryGetValue("job:location", out var loc) ? loc : null,
             Description = HtmlExtract.ToPlainText(desc),
             Parser = "finn",
+            Source = "finn",
+            CountryCode = "NO",
             Success = !string.IsNullOrWhiteSpace(title) && !string.IsNullOrWhiteSpace(desc),
         };
     }

JobTrackerApi/Services/JobImport/Plugins/JobbnorgePlugin.cs

@@ -18,6 +18,8 @@ public sealed class JobbnorgePlugin : IJobSitePlugin
             Title = title,
             Description = HtmlExtract.ToPlainText(desc),
             Parser = "jobbnorge",
+            Source = "jobbnorge",
+            CountryCode = "NO",
             Success = !string.IsNullOrWhiteSpace(title) && !string.IsNullOrWhiteSpace(desc),
         };
     }

JobTrackerApi/Services/JobImport/Plugins/LinkedInPlugin.cs

@@ -20,6 +20,7 @@ public sealed class LinkedInPlugin : IJobSitePlugin
             Company = meta.TryGetValue("og:site_name", out var sn) ? sn : null,
             Description = HtmlExtract.ToPlainText(desc),
             Parser = "linkedin",
+            Source = "linkedin",
             Success = !string.IsNullOrWhiteSpace(title) && !string.IsNullOrWhiteSpace(desc),
         };
     }

JobTrackerApi/Services/JobImport/Plugins/NavPlugin.cs

@@ -22,6 +22,8 @@ public sealed class NavPlugin : IJobSitePlugin
             Company = siteName, // better than nothing; universal parser often gets this anyway.
             Description = HtmlExtract.ToPlainText(desc),
             Parser = "nav",
+            Source = "nav",
+            CountryCode = "NO",
             Success = !string.IsNullOrWhiteSpace(title) && !string.IsNullOrWhiteSpace(desc),
         };
     }