Refresh six map table header goldens against integrated main

[gafferongames]

The generated-code check on current main fails for six map table headers added with the expanded map-value corpus. This also blocks unrelated PRs, including #669: CI run 34109282889 reports CellsTable.h, ChunksTable.h, DocsTable.h, RunsTable.h, SlotsTable.h and SpansTable.h as moved.

Refresh only those six snapshots with the compiler from main dcdd5cd. The generated differences carry the existing retained-payload handling for union/enum references, plus the existing message-form UTF-8 validation and code-point clamp for string keys in Cells and Docs. No emitter, schema, workflow or runtime code changes.

Validation: reproduced make tables-block-zero-cost failing on exactly these six files before the refresh; after it, the gate passes and reports all 117 table sources byte-identical to their pins. Reviewed the generated diff and passed git diff --check.

This is separate from #669's certification queue policy. Land this correction and carry current main into that PR before expecting its generated check to pass.

[rowan-claude]

Closed as superseded, with thanks for isolating it: #668 landed first and regenerated the same six map table headers against the unit's new vocabulary (the constants moved again with its three units), so main's block zero-cost gate is green at 123 sources byte-identical. This branch's six files were pinned against the compiler before #668 and differ from main's now; merging them would make main stale again. Nothing else in the diff.