Complete WP-0003 T06 pilot validation and sync credential routing docs

Close the dangling MVP pilots task with H1 provider-switch test, pilot
validation report, and resolver tenant-override fix. Add credential routing
guidance to AGENTS.md and Claude rules.

tests/test_registry_resolver.py

@@ -69,6 +69,7 @@ def test_resolver_precedence_and_decision():
             owner="o",
             default_value=True,
             safe_fallback=False,
+            expected_lifetime="long_lived",
         )
     )
     reg.register(
@@ -78,6 +79,7 @@ def test_resolver_precedence_and_decision():
             "...",
             owner="o",
             default_value=False,
+            expected_lifetime="long_lived",
         )
     )
 
@@ -87,7 +89,7 @@ def test_resolver_precedence_and_decision():
             "tenant:acme:tenant.test": True,
         }
     )
-    resolver = Resolver(reg, provider.values)
+    resolver = Resolver(reg, provider._values)
 
     # Kill wins
     d = resolver.evaluate("kill.test", True, {"tenant_id": "acme"})

tests/test_sdk_wrapper.py

@@ -62,3 +62,16 @@ def test_safe_default_on_missing():
 
     assert client.get_boolean_value("no.such", False) is False
     assert client.get_string_value("no.such", "def") == "def"
+
+
+def test_h1_provider_switch_without_business_code_change():
+    """UC-H1: swap provider backends without changing evaluation call sites."""
+    client = FeatureControlClient()
+    context = {"tenant_id": "acme", "actor_type": "human"}
+
+    client.set_provider(LocalProvider({"tenant.preview": True}))
+    assert client.get_boolean_value("tenant.preview", False, context) is True
+
+    # Simulate migration to a different backend with the same OpenFeature contract
+    client.set_provider(LocalProvider({"tenant.preview": False}))
+    assert client.get_boolean_value("tenant.preview", True, context) is False