feat(meanderaw): ✨ commit the lattice address table behind a check target

[JimmyPaolini]

Parent

#664

What to build

A committed markdown table describing the whole corpus, so the space is readable in one place —
one row per drawing: family, modifier, row count, true repeat span, literal address, canonical
symmetry class, and earned sub-family name.

It sits behind a check/write target pair whose default configuration is check, so a bare
run never rewrites what is committed — the same shape the examples packages use. It reads the
committed corpus rather than re-rendering it, so it stays fast enough to run under the affected
task graph on every change to this project.

Two failures, not one:

• Stale — the committed table disagrees with a fresh sweep, so a drawing changed shape
  without the table following.
• Duplicate — two drawings within one family share an address. This is the check that would
  have caught parallel's four one-strand variants before the corpus carried four names for one
  file.

Acceptance criteria

• A committed markdown table in the project README carries one row per drawing with all
  seven columns
• A check/write target pair exists with check as the default configuration, and a bare
  run rewrites nothing
• The check fails when the committed table is stale
• The check fails when two drawings within one family share an address
• The check reads the committed corpus rather than regenerating it
• Cross-family identities are visible in the table — the parallel rows whose canonical
  class is a mosaic tile's are readable as such

Blocked by

• feat(meanderaw): ✨ address a spin drawing over its true four-unit repeat #673 and feat(meanderaw): ✨ name a non-mosaic tile's sub-family by its structure #674 — the table has a column for each.