milestone 27: diagnostics — operational failures land in one curated log, resolved history purgeable

src/storage/phase6_integration_test.zig

@@ -360,7 +360,7 @@ test "S8 case 5: a retention pass prunes the old rows and truncates the write-ah
     try testing.expect(try f.sizeOf("querylog.db-wal") > 0);
 
     var pass: retention.Retention = .init(.{ .retention_days = 30 });
-    pass.runOnce(io, log_db.database(), null);
+    pass.runOnce(io, log_db.database(), null, null);
 
     try testing.expectEqual(@as(u64, 1), pass.snapshotStats().passes);
     try testing.expectEqual(@as(u64, 2), pass.snapshotStats().rows_pruned);
@@ -396,7 +396,7 @@ test "S8 case 6: a critical disk gates the flushes and recovery releases them" {
         data_path,
         null,
     );
-    monitor.sample(io);
+    monitor.sample(io, null, 0);
     try testing.expectEqual(disk_monitor.State.critical, monitor.state());
     try testing.expect(!monitor.writesAllowed());
     try testing.expect(monitor.gauges().free_bytes > 0);
@@ -418,7 +418,7 @@ test "S8 case 6: a critical disk gates the flushes and recovery releases them" {
     try testing.expectEqual(@as(i64, 0), try queries_repo.countRows(log_db.database()));
 
     monitor.cfg = .{ .min_free_mb = 0, .warn_free_mb = 0 };
-    monitor.sample(io);
+    monitor.sample(io, null, 0);
     try testing.expectEqual(disk_monitor.State.ok, monitor.state());
     try testing.expect(monitor.writesAllowed());