fix(worker): record real raw token usage per run, not the uncached remainder

task_runs.tokens_in only ever held the API's uncached "input_tokens" field
(off by a factor of ~400,000 on a resumed session), and tokens_out summed
only the last result event instead of the whole session. TaskRunner now
reads each run's cache-read/cache-write/input/output totals from the
session transcript via a new ITranscriptUsageReader.ReadSessionTotalsAsync,
storing the delta against prior runs on the same session so a --resume
doesn't double-count. New task_runs.cache_read_tokens/cache_write_tokens
columns; the Session tab now shows the raw total (what actually counts
against the 5h/7d usage limit) with a breakdown tooltip.

src/ClaudeDo.Worker/Runner/TaskRunner.cs

@@ -6,6 +6,8 @@ using ClaudeDo.Worker.Config;
 using ClaudeDo.Worker.Hub;
 using ClaudeDo.Worker.Skills;
 using ClaudeDo.Worker.State;
+using ClaudeDo.Worker.Usage;
+using ClaudeDo.Worker.Usage.Interfaces;
 using Microsoft.EntityFrameworkCore;
 using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
 
@@ -24,6 +26,7 @@ public sealed class TaskRunner
     private readonly TaskRunTokenRegistry _tokens;
     private readonly AttachmentStore _attachments;
     private readonly ISessionSkillSeeder _skillSeeder;
+    private readonly ITranscriptUsageReader _usageReader;
 
     public TaskRunner(
         IClaudeProcess claude,
@@ -36,7 +39,8 @@ public sealed class TaskRunner
         ITaskStateService state,
         TaskRunTokenRegistry tokens,
         AttachmentStore attachments,
-        ISessionSkillSeeder skillSeeder)
+        ISessionSkillSeeder skillSeeder,
+        ITranscriptUsageReader usageReader)
     {
         _claude = claude;
         _dbFactory = dbFactory;
@@ -49,6 +53,7 @@ public sealed class TaskRunner
         _tokens = tokens;
         _attachments = attachments;
         _skillSeeder = skillSeeder;
+        _usageReader = usageReader;
     }
 
     public async Task RunAsync(TaskEntity task, string slot, CancellationToken ct, bool alreadyClaimed = false)
@@ -361,8 +366,8 @@ public sealed class TaskRunner
             run.ErrorMarkdown = result.ErrorMarkdown;
             run.ExitCode = result.ExitCode;
             run.TurnCount = result.TurnCount;
-            run.TokensIn = result.TokensIn;
-            run.TokensOut = result.TokensOut;
+            if (result.SessionId is not null)
+                await ApplyUsageAsync(run, taskId, result.SessionId);
             run.FinishedAt = DateTime.UtcNow;
 
             using (var context = _dbFactory.CreateDbContext())
@@ -394,6 +399,40 @@ public sealed class TaskRunner
         }
     }
 
+    /// Populates the run's raw token fields from the session transcript (input, output,
+    /// cache-read, cache-write — the API's "input_tokens" alone is only the uncached
+    /// remainder and undercounts the real prompt size by orders of magnitude). A resumed
+    /// session's transcript is cumulative, so the delta against prior runs sharing the same
+    /// SessionId is stored, not the running total. Any failure here (missing/unreadable
+    /// transcript) leaves the fields null and must never fail the run itself.
+    private async Task ApplyUsageAsync(TaskRunEntity run, string taskId, string sessionId)
+    {
+        try
+        {
+            var totals = await _usageReader.ReadSessionTotalsAsync(sessionId, CancellationToken.None);
+            if (totals is null) return;
+
+            List<TaskRunEntity> priorRuns;
+            using (var context = _dbFactory.CreateDbContext())
+                priorRuns = await new TaskRunRepository(context).GetByTaskIdAsync(taskId, CancellationToken.None);
+
+            var sameSession = priorRuns.Where(r => r.Id != run.Id && r.SessionId == sessionId).ToList();
+            var priorInput = sameSession.Sum(r => (long)(r.TokensIn ?? 0));
+            var priorOutput = sameSession.Sum(r => (long)(r.TokensOut ?? 0));
+            var priorCacheRead = sameSession.Sum(r => (long)(r.CacheReadTokens ?? 0));
+            var priorCacheWrite = sameSession.Sum(r => (long)(r.CacheWriteTokens ?? 0));
+
+            run.TokensIn = (int)Math.Max(0, totals.InputTokens - priorInput);
+            run.TokensOut = (int)Math.Max(0, totals.OutputTokens - priorOutput);
+            run.CacheReadTokens = (int)Math.Max(0, totals.CacheReadTokens - priorCacheRead);
+            run.CacheWriteTokens = (int)Math.Max(0, totals.CacheCreationTokens - priorCacheWrite);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to read session usage totals for task {TaskId}, session {SessionId}", taskId, sessionId);
+        }
+    }
+
     private async Task HandleSuccess(TaskEntity task, ListEntity list, string slot, WorktreeContext? wtCtx, RunResult result, CancellationToken ct)
     {
         if (wtCtx is not null)