feat(career): add factual evidence bank

JobTrackerApi/Services/ApplicationAssetsService.cs

@@ -1,6 +1,7 @@
 using JobTrackerApi.Data;
 using JobTrackerApi.Models;
 using Microsoft.EntityFrameworkCore;
+using System.Text.Json;
 
 namespace JobTrackerApi.Services;
 
@@ -176,6 +177,26 @@ public sealed class ApplicationAssetsService : IApplicationAssetsService
                 match.RelevantProjects.Select(p => p.Subtitle is null ? p.Title : $"{p.Title} — {p.Subtitle}").ToList()));
         }
 
+        var evidenceTerms = match.MatchedSkills.Concat(analysis.Keywords)
+            .Where(x => !string.IsNullOrWhiteSpace(x)).Select(x => x.Trim()).Distinct(StringComparer.OrdinalIgnoreCase).ToList();
+        var evidence = await _db.CareerEvidence.AsNoTracking()
+            .Where(x => x.OwnerUserId == ownerUserId && x.IsVerified)
+            .OrderByDescending(x => x.UpdatedAtUtc)
+            .ToListAsync(ct);
+        var relevantEvidence = evidence.Where(item =>
+        {
+            var searchable = $"{item.Title} {item.Statement} {string.Join(' ', EvidenceTags(item.TagsJson))}";
+            return evidenceTerms.Any(term => searchable.Contains(term, StringComparison.OrdinalIgnoreCase));
+        }).Take(6).Select(item => $"{item.Title} — {item.Statement}").ToList();
+        if (relevantEvidence.Count > 0)
+        {
+            suggestions.Add(new TailoringSuggestionDto(
+                "career-evidence",
+                "Verified evidence to reuse",
+                "Facts you previously approved. Adapt the wording, but keep the claim accurate.",
+                relevantEvidence));
+        }
+
         if (analysis.Keywords.Count > 0)
         {
             suggestions.Add(new TailoringSuggestionDto(
@@ -297,4 +318,10 @@ public sealed class ApplicationAssetsService : IApplicationAssetsService
     private Task<JobApplication?> LoadJobAsync(string ownerUserId, int jobApplicationId, CancellationToken ct) =>
         _db.JobApplications.AsNoTracking()
             .FirstOrDefaultAsync(j => j.Id == jobApplicationId && j.OwnerUserId == ownerUserId, ct);
+
+    private static IReadOnlyList<string> EvidenceTags(string? json)
+    {
+        try { return JsonSerializer.Deserialize<List<string>>(json ?? "[]") ?? []; }
+        catch (JsonException) { return []; }
+    }
 }