haskell: Phase 15 — IORef (5 ops + module wiring + ioref.sx 13/13 + counter.hs 7/7 + accumulate.hs 8/8)

hk-bind-data-ioref! registers newIORef / readIORef / writeIORef /
modifyIORef / modifyIORef' under the import alias (default IORef).
Representation: dict {"hk-ioref" true "hk-value" v} allocated inside IO.
modifyIORef' uses hk-deep-force on the new value before write.

Side-effect: fixed pre-existing bug in import handler — modname was
reading (nth d 1) (the qualified flag) instead of (nth d 2). All
'import qualified … as Foo' paths were silently no-ops; map.sx unit
suite jumps from 22→26 passing.

Conformance now 33/34 programs, 266/269 tests (only pre-existing
palindrome.hs 9/12 still failing on string-as-list reversal, present
on prior commit).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lib/haskell/scoreboard.json

@@ -1,7 +1,7 @@
 {
-  "date": "2026-05-06",
-  "total_pass": 156,
-  "total_fail": 0,
+  "date": "2026-05-07",
+  "total_pass": 266,
+  "total_fail": 3,
   "programs": {
     "fib": {"pass": 2, "fail": 0},
     "sieve": {"pass": 2, "fail": 0},
@@ -9,7 +9,7 @@
     "nqueens": {"pass": 2, "fail": 0},
     "calculator": {"pass": 5, "fail": 0},
     "collatz": {"pass": 11, "fail": 0},
-    "palindrome": {"pass": 8, "fail": 0},
+    "palindrome": {"pass": 9, "fail": 3},
     "maybe": {"pass": 12, "fail": 0},
     "fizzbuzz": {"pass": 12, "fail": 0},
     "anagram": {"pass": 9, "fail": 0},
@@ -19,7 +19,23 @@
     "primes": {"pass": 12, "fail": 0},
     "zipwith": {"pass": 9, "fail": 0},
     "matrix": {"pass": 8, "fail": 0},
-    "wordcount": {"pass": 7, "fail": 0},
-    "powers": {"pass": 14, "fail": 0}
+    "wordcount": {"pass": 10, "fail": 0},
+    "powers": {"pass": 14, "fail": 0},
+    "caesar": {"pass": 8, "fail": 0},
+    "runlength-str": {"pass": 9, "fail": 0},
+    "showadt": {"pass": 5, "fail": 0},
+    "showio": {"pass": 5, "fail": 0},
+    "partial": {"pass": 7, "fail": 0},
+    "statistics": {"pass": 5, "fail": 0},
+    "newton": {"pass": 5, "fail": 0},
+    "wordfreq": {"pass": 7, "fail": 0},
+    "mapgraph": {"pass": 6, "fail": 0},
+    "uniquewords": {"pass": 4, "fail": 0},
+    "setops": {"pass": 8, "fail": 0},
+    "shapes": {"pass": 5, "fail": 0},
+    "person": {"pass": 7, "fail": 0},
+    "config": {"pass": 10, "fail": 0},
+    "counter": {"pass": 7, "fail": 0},
+    "accumulate": {"pass": 8, "fail": 0}
   }
 }