Order the records the way the system is learned

Jochen asked whether the order made sense. It did not -- it followed when
things happened to be decided, which after consolidation is fictional anyway
since record 5 alone folds decisions taken across a week.

Concretely wrong before: the domain statement sat at 8, after five engineering
rules; the constitution was scattered across 5, 12 and 17; the tiers landed at
15, 16, 21 and 22 with process records in between.

Now it walks: what the mesh is (1-3), its tiers from the bottom up (4-8), what
runs on them and how it gets there (9-10), how it is built (11-16), how it is
checked (17-18), how we work (19-23).

Two things made this safe rather than free. It is a permutation, not a
compaction, so the renames go through temporary names -- otherwise two files
want one slot and one is lost. And the reference rewrite is a single
simultaneous pass, because almost every number moved into a slot another number
was vacating; replacing one at a time would have cascaded and pointed things at
the wrong record while still resolving.

Verified: 284 [ADR NNNN](path) links across the repository, all with matching
text and target.

The ordering principle is now stated in 19 rather than left implicit -- the
repository already said "the numbering is the flow" about its folders, and
there was no reason for the records to be the exception.

01-RESEARCH/011-the-module-graph/features.md

@@ -55,7 +55,7 @@ registry. **Tier 2, delivery.**
 
 **Resources — desired state on a machine.** `configs`, `service`, `systemd`, `vhost`, `tools`.
 Applied, converged, idempotent — which is exactly what
-[ADR 0016](../../02-DECISIONS/0016-the-node-host.md)
+[ADR 0005](../../02-DECISIONS/0005-the-node-host.md)
 already describes and what the host already does. **Tier 0.**
 
 **Actions — run once, against something that is not this machine.** `migrations`, `seeds`,