feat(standards): fix F11-F16 and rebuild bundle (43 components) + trial findings

- F11 PopulateRule field_name/collection_name corrections
- F12 service adaptor update handles PopulatingRepository
- F13 nested-references section; F14 authless /users/me guidance
- F15 template ruff-clean; F16 stop vendoring .ruff_cache, ship .gitignore
- document --template-style in build_recipe/spec_first_routing; refresh collected
  openapi-first + standards bundle (12 modules, 43 components)
- add trial.md and trial_findings.md (F1-F16, re-trial A/B evidence)

standards/mcp/templates/app/tests/integration/test_item_routes.py

@@ -1,9 +1,9 @@
 import importlib
 
-import interfaces.openapi as routes_module
-
 from openapi_first.app import OpenAPIFirstApp
 
+import interfaces.openapi as routes_module
+
 
 def test_openapi_app_builds():
     """The spec-first app must build and plant each route handler."""

standards/mcp/templates/app/tests/integration/test_openapi_app_builds.py

@@ -1,11 +1,10 @@
 import importlib
 
 import yaml
+from openapi_first.app import OpenAPIFirstApp
 
 import interfaces.openapi as routes_module
 
-from openapi_first.app import OpenAPIFirstApp
-
 _HTTP_METHODS = {"get", "post", "put", "patch", "delete", "head", "options"}