Overview

findAndModify slow query logs omit queryShapeHash, unlike find, count, distinct, aggregate and the other write commands (insert/update/delete).

Background

The other commands call OpDebug::ensureQueryShapeHash during query shape registration (query_cmd/*.cpp, write_cmd_shape_registration.cpp). The findAndModify path never does, so OpDebug::_queryShapeHash is never populated and the field is omitted when the slow query log is serialized.

Fix Sketch

* Compute the query shape hash for findAndModify (via ensureQueryShapeHash, mirroring the update/delete path) for both the update and remove variants.

Test Re-enable

In jstests/noPassthrough/logging/log_write_command_fields.js, flip it.skip to it for "FAM TODO SERVER-XXXXX: findAndModify logs queryShapeHash" and replace SERVER-XXXXX with this ticket number. The enabled findAndModify tests currently assert the hash's absence; flip those expectQueryShapeHash: false to true.

Acceptance Criteria

* findAndModify (update and remove) slow query logs include a well-formed 64-char hex queryShapeHash.
* The re-enabled test above passes.