feat(worker): add claude-cli runner, queue service, and hub api

Runner stack (non-worktree path): IClaudeProcess + ClaudeProcess spawning the
CLI with --output-format stream-json, prompt via stdin, parses the final
type:"result" line into RunResult. LogWriter appends ndjson to
~/.todo-app/logs/<taskId>.ndjson. TaskRunner orchestrates DB transitions
(MarkRunning -> MarkDone/Failed) and pushes TaskStarted/Message/Finished/
Updated via HubBroadcaster. Worktree-backed lists short-circuit with a
"Slice E" failure message until git support lands.

QueueService (BackgroundService) holds two in-memory slots (_queueSlot +
_overrideSlot) guarded by a lock. Uses PeriodicTimer + SemaphoreSlim wake
signal so WakeQueue() triggers an instant pickup. RunNow throws
InvalidOperationException when override busy; CancelTask cancels the linked
CTS which kills the child process tree.

WorkerHub extended with GetActive, RunNow (translated to HubException
variants), CancelTask, WakeQueue. HubBroadcaster exposes typed push methods.

Tests: 26 pass (12 new). QueueServiceTests cover override-busy,
schedule-filter, FIFO sequentiality, cancellation, plus a FakeClaudeProcess
that blocks on a TCS for deterministic slot-state assertions.
MessageParserTests cover result extraction + malformed/non-result lines.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ClaudeDo.Data/Repositories/TagRepository.cs

@@ -1,3 +1,4 @@
+using ClaudeDo.Data.Models;
 using Microsoft.Data.Sqlite;
 
 namespace ClaudeDo.Data.Repositories;
@@ -8,6 +9,19 @@ public sealed class TagRepository
 
     public TagRepository(SqliteConnectionFactory factory) => _factory = factory;
 
+    public async Task<List<TagEntity>> GetAllAsync(CancellationToken ct = default)
+    {
+        await using var conn = _factory.Open();
+        await using var cmd = conn.CreateCommand();
+        cmd.CommandText = "SELECT id, name FROM tags ORDER BY id";
+
+        await using var reader = await cmd.ExecuteReaderAsync(ct);
+        var result = new List<TagEntity>();
+        while (await reader.ReadAsync(ct))
+            result.Add(new TagEntity { Id = reader.GetInt64(0), Name = reader.GetString(1) });
+        return result;
+    }
+
     public async Task<long> GetOrCreateAsync(string name, CancellationToken ct = default)
     {
         await using var conn = _factory.Open();

src/ClaudeDo.Data/Repositories/TaskRepository.cs

@@ -202,6 +202,16 @@ public sealed class TaskRepository
 
     #region Transitions
 
+    public async Task SetLogPathAsync(string taskId, string logPath, CancellationToken ct = default)
+    {
+        await using var conn = _factory.Open();
+        await using var cmd = conn.CreateCommand();
+        cmd.CommandText = "UPDATE tasks SET log_path = @log_path WHERE id = @id";
+        cmd.Parameters.AddWithValue("@id", taskId);
+        cmd.Parameters.AddWithValue("@log_path", logPath);
+        await cmd.ExecuteNonQueryAsync(ct);
+    }
+
     public async Task MarkRunningAsync(string taskId, DateTime startedAt, CancellationToken ct = default)
     {
         await using var conn = _factory.Open();