server/ws: persist repo.stats into host_repo_stats

internal/server/ws/handler.go

@@ -267,8 +267,34 @@ func dispatchAgentMessage(ctx context.Context, c *Conn, hostID string, env api.E
 			deps.OnScheduleFire(ctx, hostID, c, p.ScheduleID, p.ScheduledAt)
 		}
 
-	case api.MsgRepoStats, api.MsgCommandResult:
-		// TODO(P2): persist these projections.
+	case api.MsgRepoStats:
+		var p api.RepoStatsPayload
+		if err := env.UnmarshalPayload(&p); err != nil {
+			slog.Warn("ws: bad repo.stats payload", "host_id", hostID, "err", err)
+			break
+		}
+		patch := store.HostRepoStats{
+			HostID:              hostID,
+			TotalSizeBytes:      p.TotalSizeBytes,
+			RawSizeBytes:        p.RawSizeBytes,
+			UniqueFiles:         p.UniqueFiles,
+			SnapshotCount:       p.SnapshotCount,
+			LastCheckAt:         p.LastCheckAt,
+			LastCheckStatus:     p.LastCheckStatus,
+			LockPresent:         p.LockPresent,
+			LastPruneAt:         p.LastPruneAt,
+			LastPruneFreedBytes: p.LastPruneFreedBytes,
+		}
+		if err := deps.Store.UpsertHostRepoStats(ctx, hostID, patch); err != nil {
+			slog.Warn("ws: upsert host repo stats", "host_id", hostID, "err", err)
+		} else {
+			slog.Info("ws: repo stats refreshed", "host_id", hostID)
+		}
+
+	case api.MsgCommandResult:
+		// TODO(P2): persist command.result acks for "did the agent
+		// accept the dispatch?" forensics. Currently the job lifecycle
+		// (job.started → job.finished) is sufficient signal.
 		slog.Debug("ws msg not yet handled", "type", env.Type, "host_id", hostID)
 
 	case api.MsgError: