Adds Framework/ViewRenderer.wsc (WscMvc.ViewRenderer), loading separate
.html templates and substituting {{Key}} placeholders with HTML-encoded
values from a Scripting.Dictionary. Wires /hello through the new pipeline
(HomeController -> Application -> ViewRenderer -> Views/Home.html) while
preserving the exact pre-M4 response body, so the M1 acceptance test
doubles as a live regression check for the render pipeline.

Views/ is unreachable over HTTP by the same physical-separation guarantee
already used for Framework/ and Controllers/ (sibling of public/, never
inside it) - verified directly, not assumed.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

- Controllers/SelfTestController.wsc: runs the same checks as
  tests/Test-Components.vbs in-process, returns JSON
  ({ok, checks:[{name,pass,detail}]}) - no PowerShell/cscript/SSH needed
- Application.wsc routes /self-test to it; always HTTP 200 (pass/fail lives
  in the JSON body, matching conventional health-check design)
- tests/run-self-test.sh: pure curl + python3 wrapper, verified working
  directly from the Linux host with zero Windows tooling
- tests/Test-Http.ps1: now also calls /self-test and folds each check into
  its own PASS/FAIL output
- Verified both the happy path and a genuine failure path (deliberately
  broke HomeController's registration, confirmed /self-test correctly
  reported ok:false with the specific failing check pinpointed, then
  re-registered and confirmed full recovery)
- docs updated: ARCHITECTURE.md, DECISIONS.md, TEST-RESULTS.md