GUEST: step 1 — lib/guest/conformance.{sx,sh} config-driven driver

Extracted the duplicated conformance plumbing into a single driver:

- lib/guest/conformance.sx — two helper fns that emit (gc-result NAME P F T)
  lines for the bash side to grep: gc-dict-result for runners returning
  a {:passed :failed :total} dict, and gc-counters-result for guests that
  bump a global pass/fail counter from a test file load.

- lib/guest/conformance.sh — config-driven bash driver. Sources a per-lang
  conf, locates sx_server, runs sx_server in either single-session "dict"
  mode (one preload + many suite evals) or per-suite "counters" mode
  (fresh sx_server per suite, with shared preloads). Aggregates and writes
  scoreboard.{json,md} via per-lang emit_scoreboard_* functions.

- Ported lib/prolog/conformance.sh and lib/haskell/conformance.sh down to
  one-line wrappers that exec the shared driver against their .conf file.

Verification:
- Prolog: 590/590 — diff vs baseline is timestamp-only.
- Haskell: 156/156 — significantly higher than the 0/18 in baseline. The
  old conformance.sh was buggy (its `(ok-len 3 ...)` grep never matched,
  defaulting every program to 0 pass / 1 fail). Updated baseline to the
  true count; no actual test regressed. Plan baseline cell updated.

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

lib/prolog/conformance.conf

@@ -0,0 +1,80 @@
+# Prolog conformance config — sourced by lib/guest/conformance.sh.
+
+LANG_NAME=prolog
+MODE=dict
+
+PRELOADS=(
+  lib/prolog/tokenizer.sx
+  lib/prolog/parser.sx
+  lib/prolog/runtime.sx
+  lib/prolog/query.sx
+  lib/prolog/compiler.sx
+  lib/prolog/hs-bridge.sx
+)
+
+SUITES=(
+  "parse:lib/prolog/tests/parse.sx:(pl-parse-tests-run!)"
+  "unify:lib/prolog/tests/unify.sx:(pl-unify-tests-run!)"
+  "clausedb:lib/prolog/tests/clausedb.sx:(pl-clausedb-tests-run!)"
+  "solve:lib/prolog/tests/solve.sx:(pl-solve-tests-run!)"
+  "operators:lib/prolog/tests/operators.sx:(pl-operators-tests-run!)"
+  "dynamic:lib/prolog/tests/dynamic.sx:(pl-dynamic-tests-run!)"
+  "findall:lib/prolog/tests/findall.sx:(pl-findall-tests-run!)"
+  "term_inspect:lib/prolog/tests/term_inspect.sx:(pl-term-inspect-tests-run!)"
+  "append:lib/prolog/tests/programs/append.sx:(pl-append-tests-run!)"
+  "reverse:lib/prolog/tests/programs/reverse.sx:(pl-reverse-tests-run!)"
+  "member:lib/prolog/tests/programs/member.sx:(pl-member-tests-run!)"
+  "nqueens:lib/prolog/tests/programs/nqueens.sx:(pl-nqueens-tests-run!)"
+  "family:lib/prolog/tests/programs/family.sx:(pl-family-tests-run!)"
+  "atoms:lib/prolog/tests/atoms.sx:(pl-atom-tests-run!)"
+  "query_api:lib/prolog/tests/query_api.sx:(pl-query-api-tests-run!)"
+  "iso_predicates:lib/prolog/tests/iso_predicates.sx:(pl-iso-predicates-tests-run!)"
+  "meta_predicates:lib/prolog/tests/meta_predicates.sx:(pl-meta-predicates-tests-run!)"
+  "list_predicates:lib/prolog/tests/list_predicates.sx:(pl-list-predicates-tests-run!)"
+  "meta_call:lib/prolog/tests/meta_call.sx:(pl-meta-call-tests-run!)"
+  "set_predicates:lib/prolog/tests/set_predicates.sx:(pl-set-predicates-tests-run!)"
+  "char_predicates:lib/prolog/tests/char_predicates.sx:(pl-char-predicates-tests-run!)"
+  "io_predicates:lib/prolog/tests/io_predicates.sx:(pl-io-predicates-tests-run!)"
+  "assert_rules:lib/prolog/tests/assert_rules.sx:(pl-assert-rules-tests-run!)"
+  "string_agg:lib/prolog/tests/string_agg.sx:(pl-string-agg-tests-run!)"
+  "advanced:lib/prolog/tests/advanced.sx:(pl-advanced-tests-run!)"
+  "compiler:lib/prolog/tests/compiler.sx:(pl-compiler-tests-run!)"
+  "cross_validate:lib/prolog/tests/cross_validate.sx:(pl-cross-validate-tests-run!)"
+  "integration:lib/prolog/tests/integration.sx:(pl-integration-tests-run!)"
+  "hs_bridge:lib/prolog/tests/hs_bridge.sx:(pl-hs-bridge-tests-run!)"
+)
+
+emit_scoreboard_json() {
+  local n=${#GC_NAMES[@]} i sep
+  printf '{\n'
+  printf '  "total_passed": %d,\n' "$GC_TOTAL_PASS"
+  printf '  "total_failed": %d,\n' "$GC_TOTAL_FAIL"
+  printf '  "total": %d,\n' "$GC_TOTAL"
+  printf '  "suites": {'
+  for ((i=0; i<n; i++)); do
+    sep=","; [ $i -eq $((n-1)) ] && sep=""
+    printf '"%s":{"passed":%d,"total":%d,"failed":%d}%s' \
+      "${GC_NAMES[$i]}" "${GC_PASS[$i]}" "${GC_TOTAL_S[$i]}" "${GC_FAIL[$i]}" "$sep"
+  done
+  printf '},\n'
+  printf '  "generated": "%s"\n' "$(date -Iseconds 2>/dev/null || date)"
+  printf '}\n'
+}
+
+emit_scoreboard_md() {
+  local n=${#GC_NAMES[@]} i status when
+  when="$(date -Iseconds 2>/dev/null || date)"
+  printf '# Prolog scoreboard\n\n'
+  printf '**%d / %d passing** (%d failure(s)).\n' \
+    "$GC_TOTAL_PASS" "$GC_TOTAL" "$GC_TOTAL_FAIL"
+  printf 'Generated %s.\n\n' "$when"
+  printf '| Suite | Passed | Total | Status |\n'
+  printf '|-------|--------|-------|--------|\n'
+  for ((i=0; i<n; i++)); do
+    status="ok"; [ "${GC_FAIL[$i]}" -gt 0 ] && status="FAIL"
+    printf '| %s | %d | %d | %s |\n' \
+      "${GC_NAMES[$i]}" "${GC_PASS[$i]}" "${GC_TOTAL_S[$i]}" "$status"
+  done
+  printf '\nRun `bash lib/prolog/conformance.sh` to refresh. Override the binary\n'
+  printf 'with `SX_SERVER=path/to/sx_server.exe bash …`.\n'
+}