Add (param :as type) annotations to defcomp params across all services and templates

Annotates ~500 defcomp params across 62 files: market (5), blog (7), cart (5),
events (3), federation (4), account (3), orders (2), shared templates (11),
sx docs (14), plus remaining spec fn params (z3, test-framework, adapter-dom,
adapter-async, engine, eval). Total annotations in codebase: 1043.

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

shared/sx/ref/adapter-async.sx

@@ -233,7 +233,7 @@
 ;; --------------------------------------------------------------------------
 
 (define-async async-render-island
-  (fn (island (args :as list) (env :as dict) ctx)
+  (fn ((island :as island) (args :as list) (env :as dict) ctx)
     (let ((kwargs (dict))
           (children (list)))
       (async-parse-kw-args args kwargs children env ctx)