feat(worker): session skills SignalR surface + per-level persistence

src/ClaudeDo.Data/Repositories/AppSettingsRepository.cs

@@ -64,6 +64,7 @@ public sealed class AppSettingsRepository
             ? null : updated.ReportExcludedPaths;
         row.StandupWeekday = updated.StandupWeekday;
         row.DailyPrepMaxTasks = updated.DailyPrepMaxTasks < 1 ? 1 : updated.DailyPrepMaxTasks;
+        row.SessionSkills = string.IsNullOrWhiteSpace(updated.SessionSkills) ? null : updated.SessionSkills;
 
         await _context.SaveChangesAsync(ct);
     }

src/ClaudeDo.Data/Repositories/ListRepository.cs

@@ -77,6 +77,7 @@ public sealed class ListRepository
             existing.SystemPrompt = config.SystemPrompt;
             existing.AgentPath = config.AgentPath;
             existing.MaxTurns = config.MaxTurns;
+            existing.SessionSkills = config.SessionSkills;
         }
         await _context.SaveChangesAsync(ct);
     }

src/ClaudeDo.Data/Repositories/TaskRepository.cs

@@ -189,6 +189,7 @@ public sealed class TaskRepository
         string? systemPrompt,
         string? agentPath,
         int? maxTurns = null,
+        string? sessionSkills = null,
         CancellationToken ct = default)
     {
         await _context.Tasks
@@ -197,7 +198,8 @@ public sealed class TaskRepository
                 .SetProperty(t => t.Model, model)
                 .SetProperty(t => t.SystemPrompt, systemPrompt)
                 .SetProperty(t => t.AgentPath, agentPath)
-                .SetProperty(t => t.MaxTurns, maxTurns), ct);
+                .SetProperty(t => t.MaxTurns, maxTurns)
+                .SetProperty(t => t.SessionSkills, sessionSkills), ct);
     }
 
     #endregion