feat(#41): admin/renders pagination + user name link + output + project name

render-svc admin-renders enriches jobs with user_name/email (cross-schema lookup to
identity.users). Page adds prev/next pagination (page_size 30). Table adds User column
(name → /admin/users?q=email) and Output column (export → /admin/exports), and shows
project_name. Verified: 21 jobs, paginated, names resolved.

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

services/render/internal/db/renders_admin.go

@@ -41,5 +41,47 @@ func (s *Store) ListAllJobs(ctx context.Context, status string, page, pageSize i
 	}
 	defer rows.Close()
 	jobs, err := scanJobs(rows)
+	if err != nil {
+		return nil, 0, err
+	}
+	s.attachUserInfo(ctx, jobs)
 	return jobs, total, err
 }
+
+// attachUserInfo fills UserName/UserEmail on each job via one cross-schema lookup
+// against identity.users (same Postgres DB). Best-effort — failures leave names blank.
+func (s *Store) attachUserInfo(ctx context.Context, jobs []*models.RenderJob) {
+	if len(jobs) == 0 {
+		return
+	}
+	ids := make([]string, 0, len(jobs))
+	seen := map[string]bool{}
+	for _, j := range jobs {
+		id := j.UserID.String()
+		if !seen[id] {
+			seen[id] = true
+			ids = append(ids, id)
+		}
+	}
+	rows, err := s.pool.Query(ctx,
+		`SELECT id::text, COALESCE(full_name,''), COALESCE(email,'') FROM identity.users WHERE id = ANY($1)`,
+		ids)
+	if err != nil {
+		return
+	}
+	defer rows.Close()
+	type ui struct{ name, email string }
+	m := map[string]ui{}
+	for rows.Next() {
+		var id, name, email string
+		if rows.Scan(&id, &name, &email) == nil {
+			m[id] = ui{name, email}
+		}
+	}
+	for _, j := range jobs {
+		if info, ok := m[j.UserID.String()]; ok {
+			j.UserName = info.name
+			j.UserEmail = info.email
+		}
+	}
+}

services/render/internal/models/models.go

@@ -180,6 +180,9 @@ type RenderJob struct {
 	CompletedAt         *time.Time `json:"completed_at,omitempty"`
 	CreatedAt           time.Time  `json:"created_at"`
 	UpdatedAt           time.Time  `json:"updated_at"`
+	// Admin-list enrichment (set by the handler via a cross-schema lookup, not scanned).
+	UserName  string `json:"user_name,omitempty"`
+	UserEmail string `json:"user_email,omitempty"`
 }
 
 type FrameJob struct {