feat(WP-0009): IHF GAAF Compliance Foundation — type registries, extension manifests, architectural contracts

Implements IHUB-WP-0009: closes four GAAF-2026 gaps before domain hub work begins.
- TypeRegistry helper + controllers/views (hub_kind, hub_capability_manifest)
- HubCapabilityManifest entity with validation and registry linkage
- ARCHITECTURE-LAYERS.md + CI-enforced boundary contracts
- Alembic migration 1743724800, fitness tests (Test/Architecture/)
- GAAF spec, Operational Architecture spec, domain hub extension guide
- Updates to CLAUDE.md, SCOPE.md, Schema.sql, Routes, FrontController, Types

state_hub_sync: pending (tunnel was STALE at completion time; run fix-consistency)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Test/Main.hs

@@ -2,12 +2,12 @@ module Main where
 
 import Test.Hspec
 import IHP.Prelude
-
--- Import your test specs here:
--- import Test.MySpec
+import qualified Test.Architecture.LayerBoundarySpec as LayerBoundary
 
 main :: IO ()
 main = hspec do
     describe "Example" do
         it "should pass" do
             1 + 1 `shouldBe` (2 :: Int)
+
+    LayerBoundary.spec