feat(space): InformationSpace orchestrator + integration; foundation slice complete (WP-0007 T7)

InformationSpace ties the slice together: conformance-gated attach → resolve →
read, with alias() recording coordination decisions in the log. Exposed from the
package root. End-to-end integration test (two folder shards → union read with
layered provenance + chorus + alias redirect + red-link + nonconformant-rejected).
pyflakes clean, 39 tests green. Flips WP-0007 done.

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

workplans/SHARD-WP-0007-foundation-implementation.md

@@ -4,7 +4,7 @@ type: workplan
 title: "foundation implementation — model, contract, decision log, union read"
 domain: whynot
 repo: shard-wiki
-status: active
+status: done
 owner: tegwick
 topic_slug: whynot
 created: "2026-06-15"
@@ -131,7 +131,7 @@ the same name → chorus; alias from the log redirects resolution.
 
 ```task
 id: SHARD-WP-0007-T7
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "86c0b255-e373-460d-859d-a39bf6ea4ffb"
 ```