Use match for value dispatch in evaluator and compiler

Convert large cond chains doing string equality dispatch to use the
match special form: step-eval-list (42 arms), step-continue (31 arms),
compile-list (30 arms), ho-setup-dispatch (7 arms), value-matches-type?
(10 arms). Also fix test-canonical.sx to use defsuite/deftest format
and load canonical.sx in both test runners.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

spec/tests/test-canonical.sx

@@ -1,91 +1,97 @@
-(test-group
+(defsuite
   "canonical-serialize"
-  (test "nil" (assert= (canonical-serialize nil) "nil"))
-  (test
+  (deftest "nil" (assert= (canonical-serialize nil) "nil"))
+  (deftest
     "booleans"
     (assert= (canonical-serialize true) "true")
     (assert= (canonical-serialize false) "false"))
-  (test
+  (deftest
     "integers"
     (assert= (canonical-serialize 0) "0")
     (assert= (canonical-serialize 42) "42")
     (assert= (canonical-serialize -7) "-7"))
-  (test
+  (deftest
     "strings"
     (assert= (canonical-serialize "hello") "\"hello\"")
     (assert= (canonical-serialize "") "\"\"")
     (assert= (canonical-serialize "a\"b") "\"a\\\"b\""))
-  (test
+  (deftest
     "symbols"
     (assert= (canonical-serialize (quote deref)) "deref")
     (assert= (canonical-serialize (quote swap!)) "swap!"))
-  (test
+  (deftest
     "keywords"
-    (assert= (canonical-serialize :class) ":class")
-    (assert= (canonical-serialize :arity) ":arity"))
-  (test "empty list" (assert= (canonical-serialize (list)) "()"))
-  (test "flat list" (assert= (canonical-serialize (list 1 2 3)) "(1 2 3)"))
-  (test
+    (assert= (canonical-serialize (make-keyword "class")) ":class")
+    (assert= (canonical-serialize (make-keyword "arity")) ":arity"))
+  (deftest "empty list" (assert= (canonical-serialize (list)) "()"))
+  (deftest
+    "flat list"
+    (assert= (canonical-serialize (list 1 2 3)) "(1 2 3)"))
+  (deftest
     "nested list"
     (assert=
       (canonical-serialize
-        (list (quote div) :class "flex" (list (quote h2) "title")))
+        (list
+          (quote div)
+          (make-keyword "class")
+          "flex"
+          (list (quote h2) "title")))
       "(div :class \"flex\" (h2 \"title\"))"))
-  (test
+  (deftest
     "dict keys sorted"
     (let
-      ((d (dict "zebra" 1 "alpha" 2 "middle" 3)))
+      ((d {:zebra 1 :middle 3 :alpha 2}))
       (assert= (canonical-serialize d) "{:alpha 2 :middle 3 :zebra 1}")))
-  (test
+  (deftest
     "dict with nested values"
     (let
-      ((d (dict "a" (list 1 2) "b" "hello")))
+      ((d {:b "hello" :a (list 1 2)}))
       (assert= (canonical-serialize d) "{:a (1 2) :b \"hello\"}"))))
 
-(test-group
+(defsuite
   "content-id"
-  (test
+  (deftest
     "same expression same CID"
     (assert= (content-id (list 1 2 3)) (content-id (list 1 2 3))))
-  (test
+  (deftest
     "different expression different CID"
     (assert
       (not (= (content-id (list 1 2 3)) (content-id (list 1 2 4))))))
-  (test
+  (deftest
     "CID is a hex string"
     (let
       ((cid (content-id 42)))
       (assert (string? cid))
       (assert= (len cid) 64)))
-  (test
+  (deftest
     "short CID is 16 chars"
     (let ((cid (content-id-short 42))) (assert= (len cid) 16)))
-  (test
+  (deftest
     "short CID is prefix of full CID"
     (let
       ((full (content-id 42)) (short (content-id-short 42)))
       (assert= short (slice full 0 16)))))
 
-(test-group
+(defsuite
   "bytecode-module"
-  (test
+  (deftest
     "make and query"
     (let
-      ((m (make-bytecode-module 1 "abc123" (list (quote code) :bytecode (list 1 2 3)))))
+      ((m (make-bytecode-module 1 "abc123" (list 1 2 3))))
       (assert (bytecode-module? m))
       (assert= (bytecode-module-version m) 1)
       (assert= (bytecode-module-source-hash m) "abc123")))
-  (test
+  (deftest
     "non-module fails predicate"
     (assert (not (bytecode-module? (list 1 2 3))))
     (assert (not (bytecode-module? "hello")))))
 
-(test-group
+(defsuite
   "provenance"
-  (test
+  (deftest
     "make provenance record"
     (let
-      ((p (make-provenance "src-cid" "bc-cid" "compiler-cid" "2026-03-27T00:00:00Z")))
+      ((p (make-provenance "src-cid" "bc-cid" "v1" "js")))
       (assert= (first p) (quote provenance))
       (assert= (nth p 2) "src-cid")
       (assert= (nth p 4) "bc-cid"))))