Adapt specs and workplans to SWOT Stage 0 sequencing

Introduce SCOPE, expanded README, CONTRIBUTING, and provisional open-question
defaults. Rescope Trust Service work to offline schemas/fold/fixtures, add
normative core extraction workplan, and split PRD roadmap Phase 4 into
foundation vs hosted service. Sync workplans with State Hub.

.repo-classification.yaml

@@ -7,7 +7,13 @@ repo_classification:
   domain: infotech
   secondary_domains:
   - financials
-  capability_tags: []
+  capability_tags:
+  - licensing
+  - monetization-framework
+  - delayed-open-source
+  - source-available
+  - trust-ledger
+  - development-credits
   business_stake:
   - technology
   - product