Implement query shape and query stats store key for the insert command, following the same pattern as update (UpdateCmdShape + UpdateKey).

Scope

InsertCmdShape (src/mongo/db/query/query_shape/insert_cmd_shape.h/.cpp)

• insert (collection name): included as-is
• documents: shapified as placeholder ?array<?object>
• All other fields: excluded

InsertKey (src/mongo/db/query/query_stats/insert_key.h/.cpp)

• ordered: kept as-is
• maxTimeMS: abstracted
• writeConcern: kept as-is
• bypassDocumentValidation: kept as-is
• comment: abstracted

Integration (write_ops_exec.cpp)

• Call query_stats::registerWriteRequest() at the insert execution site
• Guard with featureFlagQueryStatsInsert

Bazel

• Wire new targets into build files