perf(analytics): project minimal columns in GetStats/GetAnalyticsOverview

Both endpoints materialised full JobApplication rows (GetAnalyticsOverview also
Include-d full Company) purely to aggregate a few fields, dragging the large
Description/TranslatedDescription/TailoredCvText/Notes/CoverLetter blobs over
the wire on every dashboard load. Project to only the columns each aggregation
needs (mirrors the existing GetTagTrends pattern). Behaviour is identical;
aggregation stays in memory over a small per-tenant set.

Backend suite: 92/92 green.

Note: the planned hot-path *index* migration is deferred — the committed EF
ModelSnapshot is stale (21 lines, no entities), so `migrations add` cannot
produce a clean incremental diff. Resyncing the snapshot is a prerequisite and
is tracked as its own task.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

JobTrackerApi/Controllers/JobApplicationsController.cs

@@ -1750,8 +1750,13 @@ Canonical profile:
         {
             var now = DateTime.Now;
 
+            // Project to only the columns the stats need instead of materialising full
+            // JobApplication rows (which drag large Description/TranslatedDescription/
+            // TailoredCvText/Notes blobs). Aggregation stays in memory over a small
+            // per-tenant set. Mirrors the projection pattern used by GetTagTrends.
             var all = await _db.JobApplications
                 .AsNoTracking()
+                .Select(j => new { j.IsDeleted, j.Status, j.DateApplied })
                 .ToListAsync(cancellationToken);
 
             var active = all.Where(j => !j.IsDeleted).ToList();
@@ -2668,10 +2673,21 @@ Candidate master CV:
         [HttpGet("analytics-overview")]
         public async Task<ActionResult<AnalyticsOverviewDto>> GetAnalyticsOverview(CancellationToken cancellationToken)
         {
+            // Project to only the fields the overview needs instead of Include-ing full
+            // Company + JobApplication rows (avoids loading large description/CV blobs).
             var activeJobs = await _db.JobApplications
                 .AsNoTracking()
-                .Include(j => j.Company)
                 .Where(j => !j.IsDeleted)
+                .Select(j => new
+                {
+                    j.Status,
+                    j.ResponseReceived,
+                    j.ResponseDate,
+                    j.DateApplied,
+                    j.CompanyId,
+                    CompanyName = j.Company.Name,
+                    CompanySource = j.Company.Source
+                })
                 .ToListAsync(cancellationToken);
 
             var funnelMap = new Dictionary<string, int>
@@ -2686,7 +2702,7 @@ Candidate master CV:
             var funnel = funnelMap.Select(x => new FunnelStagePoint(x.Key, x.Value)).ToList();
 
             var responseRateBySource = activeJobs
-                .GroupBy(j => string.IsNullOrWhiteSpace(j.Company?.Source) ? "Unknown source" : j.Company!.Source!.Trim())
+                .GroupBy(j => string.IsNullOrWhiteSpace(j.CompanySource) ? "Unknown source" : j.CompanySource!.Trim())
                 .Select(g => new ResponseRatePoint(
                     g.Key,
                     g.Count(),
@@ -2699,7 +2715,7 @@ Candidate master CV:
                 .ToList();
 
             var topCompanies = activeJobs
-                .GroupBy(j => new { j.CompanyId, Name = j.Company.Name })
+                .GroupBy(j => new { j.CompanyId, Name = j.CompanyName })
                 .Select(g => new CompanyActivityPoint(
                     g.Key.CompanyId,
                     g.Key.Name,