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/agent/briefs/standard-repository-layout.md

@@ -0,0 +1,37 @@
+---
+id: agent-brief/standard-repository-layout
+artifact_id: standard/repository-layout
+source_path: standards/repository-layout/InfoTechCanonRepositoryLayoutStandard.md
+source_kind: standard
+generated: true
+---
+
+<!-- GENERATED by info_tech_canon; do not edit by hand. -->
+
+# Agent Brief: InfoTechCanon Repository Layout Standard
+
+- Artifact ID: `standard/repository-layout`
+- Kind: `standard`
+- Canonical path: `standards/repository-layout/InfoTechCanonRepositoryLayoutStandard.md`
+- Full source: `standards/repository-layout/InfoTechCanonRepositoryLayoutStandard.md`
+- Summary: Cross-cutting canon standard: InfoTechCanon Repository Layout Standard.
+
+## Retrieval Hints
+
+Imports and anchors:
+- `kernel/itc-core`
+- `model/governance`
+- `model/information-space`
+- `model/task`
+
+## Owned Concepts
+
+- `CanonicalRepositoryLayout`
+- `InfoTechCanon Repository Layout Standard`
+- `LayoutConformanceLevel`
+- `RepositoryDocumentationDirectory`
+- `ScopeIntentOperatingMode`
+
+## Related Distinctions
+
+No common distinction is anchored directly on this artifact.