core: migrate repeatedly to Clojure + fix char-not-callable / take count validation

Resolves the deferred repeatedly port (jolt-8qx). The blockers were two jolt
leniencies vs Clojure, now fixed (and correct beyond repeatedly):

- A char (a :jolt/type-tagged struct) fell into the struct-as-map branch of both
  jolt-call (compile path) and the interpreter's apply dispatch, so (\a) returned
  nil instead of throwing. Now only an UNtagged struct (a map literal) — or a
  record — is callable as a key lookup; tagged structs fall through to "Cannot
  call … as a function". Symbols are still handled (keyword-style get).
- core-take didn't validate its count, letting Janet's >= silently compare an int
  to a char/string. It now rejects a non-number n like Clojure.

With those, the canonical CLJ repeatedly matches: (first (repeatedly non-fn)) and
(repeatedly non-number f) throw. Moved repeatedly to core/40-lazy.clj; removed
core-repeatedly + its binding from the seed.

These correctness fixes help broadly: repeatedly.cljc goes clean (19/10 -> 29/0),
and the suite rises 4004 -> 4034 pass / 66 -> 67 clean. Baseline raised.

Gate: conformance 262x3, lazy-infinite 44/44, clojure-test-suite 4034/67,
fixpoint, self-host, sci, fallback-zero, specs+unit green.

jolt-core/clojure/core/40-lazy.clj

@@ -85,10 +85,12 @@
         (cstep 0)))
     ()))
 
-;; repeatedly stays in the Janet seed for now (core-repeatedly): the canonical CLJ
-;; version doesn't validate args, so (first (repeatedly non-fn)) / (repeatedly \a +)
-;; don't throw like the stricter Janet version (repeatedly.cljc throw cases).
-;; Ported separately once the non-fn / non-number-count throws are matched.
+;; --- repeatedly --- ((f) throws on a non-fn; (take n …) throws on a non-number
+;; count — both now enforced in the seed (jolt-call / core-take), so the canonical
+;; CLJ form matches the repeatedly.cljc exception cases.)
+(defn repeatedly
+  ([f] (lazy-seq (cons (f) (repeatedly f))))
+  ([n f] (take n (repeatedly f))))
 
 ;; --- repeat ---
 (defn repeat

src/jolt/core.janet

@@ -508,7 +508,10 @@
         (if (and (number? k) (= k (math/floor k)) (>= k 0) (< k (length f)))
           (in f k)
           (error (string "Index " k " out of bounds for vector of length " (length f)))))
-    (or (struct? f) (and (table? f) (get f :jolt/deftype)))
+    # Map literal (struct with no :jolt/type marker) or a record: callable as a
+    # key lookup. A TAGGED struct (char/etc.) is NOT a fn — symbols are handled
+    # above; everything else with a :jolt/type falls through to the error.
+    (or (and (struct? f) (nil? (get f :jolt/type))) (and (table? f) (get f :jolt/deftype)))
       (let [v (get f (get args 0) :jolt/not-found)]
         (if (= v :jolt/not-found) (get args 1) v))
     (error (string "Cannot call " (type f) " as a function"))))
@@ -1091,6 +1094,9 @@
       (error "Wrong number of args passed to: reduce"))))
 
 (defn core-take [n & rest]
+ # n is a count — reject non-numbers (e.g. a char/string) like Clojure, rather
+ # than letting Janet's >= silently compare mixed types.
+ (unless (number? n) (error (string "take: n must be a number, got " (type n))))
  (if (= 0 (length rest)) (td-take n)
   (let [coll (in rest 0)]
     # Option A: lazy take (returns a seq, not a vector, even over a vector).
@@ -1401,15 +1407,7 @@
 
 # repeat / iterate now live in the Clojure lazy tier (core/40-lazy.clj).
 
-(defn core-repeatedly
-  "(repeatedly f) -> infinite lazy seq of (f) calls; (repeatedly n f) -> n calls."
-  [a & rest]
-  (if (= 0 (length rest))
-    (do (defn rstep [] (fn [] @[(a) (rstep)])) (make-lazy-seq (rstep)))
-    (let [n a f (in rest 0)]
-      (var result @[]) (var i 0)
-      (while (< i n) (array/push result (f)) (++ i))
-      result)))
+# repeatedly now lives in the Clojure lazy tier (core/40-lazy.clj).
 
 # ============================================================
 # Higher-order functions
@@ -2852,7 +2850,6 @@
     "sort-by" core-sort-by
     "partition" core-partition
     "range" core-range
-    "repeatedly" core-repeatedly
     "identity" core-identity
     "constantly" core-constantly
     "complement" core-complement

src/jolt/evaluator.janet

@@ -116,7 +116,9 @@
         (if (and (number? k) (= k (math/floor k)) (>= k 0) (< k (length f)))
           (in f k)
           (error (string "Index " k " out of bounds for vector of length " (length f)))))
-    (struct? f)
+    # Map literal only (struct with no :jolt/type). A tagged struct (char/etc.)
+    # is not callable — symbols are handled above; chars fall through to the error.
+    (and (struct? f) (nil? (get f :jolt/type)))
       (let [v (get f (get args 0) :jolt/not-found)]
         (if (= v :jolt/not-found) (get args 1) v))
     (and (table? f) (get f :jolt/deftype))

test/integration/clojure-test-suite-test.janet

@@ -40,9 +40,9 @@
 # many cross-dialect files). Stable across runs.
 # Raised 3981 -> 4004 migrating 7 lazy seq fns to the Clojure overlay (40-lazy
 # tier): the canonical CLJ versions add coverage (e.g. distinct value-equality).
-(def baseline-pass 4004)
+(def baseline-pass 4034)
 # A file is "clean" when it ran with zero failures AND zero errors.
-(def baseline-clean-files 66)
+(def baseline-clean-files 67)
 # Per-file wall-clock budget (seconds). Normal files finish in well under 1s, so
 # this normally only fires on genuinely-infinite-sequence hangs. It's an env var
 # (JOLT_SUITE_TIMEOUT) so CI — whose runners are slower than a dev machine — can