ITC-WP-0012: integrate Repository Layout Standard

Register the InfoTechCanon Repository Layout Standard as a domain standard
(itc-repo-layout), processed from demand through the canon's Purpose/Demand
intake without collapsing existing model concepts.

- Register standard in artifacts/index.yaml, canon.yaml, infospace.yaml;
  regenerate indexes, views, briefs, tree, and validation (validate green).
- T04: add reconciliation.yaml (partial/as-is dogfooding, declared core
  conformance, recorded tensions); resolve the demand by moving it out of
  demand/ to the evaluation pack as source-demand.md and removing demand/.
- T05: add consumer-adoption-brief.md for downstream repos.
- Update test artifact/standard counts (60->61, standards 2->3).
- Mark T03/T04/T05 done; workplan and registry status -> finished.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

infospace/validation/latest.json

@@ -1,14 +1,14 @@
 {
   "details": {
-    "artifact_count": 60,
-    "relationship_count": 273
+    "artifact_count": 61,
+    "relationship_count": 277
   },
   "errors": [],
   "metrics": {
     "coherence_components": 1.0,
     "consistency_cycles": 0.0,
     "coverage_ratio": 1.0,
-    "granularity_entropy": 4.32498473489172,
+    "granularity_entropy": 4.329602269609256,
     "redundancy_ratio": 0.0
   },
   "ok": true,