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.Data/Configuration/TaskRunEntityConfiguration.cs

@@ -24,6 +24,8 @@ public class TaskRunEntityConfiguration : IEntityTypeConfiguration<TaskRunEntity
         builder.Property(r => r.TurnCount).HasColumnName("turn_count");
         builder.Property(r => r.TokensIn).HasColumnName("tokens_in");
         builder.Property(r => r.TokensOut).HasColumnName("tokens_out");
+        builder.Property(r => r.CacheReadTokens).HasColumnName("cache_read_tokens");
+        builder.Property(r => r.CacheWriteTokens).HasColumnName("cache_write_tokens");
         builder.Property(r => r.LogPath).HasColumnName("log_path");
         builder.Property(r => r.StartedAt).HasColumnName("started_at");
         builder.Property(r => r.FinishedAt).HasColumnName("finished_at");