tooling+plan: harness SX_SERVING_JIT=1 fix, conformance timeout bump, specialised editors

- live-check.sh + run-picker-check.sh now set SX_SERVING_JIT=1 to MATCH THE CONTAINER:
  that env gates the http-listen IO resolver, so without it perform-heavy paths (the is-a/
  tags picker's reach-down BFS) falsely raise VmSuspended -> 500 in the harness while the
  live site is fine (confirmed live is-a picker = 200). Harness must mirror what the
  container runs.
- conformance.sh: 600s -> 1200s cap (overridable via SX_CONF_TIMEOUT). A sibling loop at
  load ~6 pushed the Datalog-heavy blog suite past 600s -> false 'no suite results parsed'.
- plan: types can specify SPECIALISED EDITORS — a type's :editor slot = a content-addressed
  editor component (WYSIWYG, map picker) shipped to the client like ~relate-picker. Generic
  form is the default, not the ceiling; spectrum = generic -> per-field widget -> :editor.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/host/playwright/run-picker-check.sh

@@ -35,7 +35,9 @@ cleanup() {
 trap cleanup EXIT
 
 echo "== starting ephemeral host server on :$PORT (persist=$PDIR) =="
-HOST_PORT="$PORT" SX_PERSIST_DIR="$PDIR" \
+# SX_SERVING_JIT=1 matches the live container (gates the http-listen IO resolver);
+# without it, perform-heavy paths (e.g. the is-a/tags picker's reach-down) falsely 500.
+SX_SERVING_JIT=1 HOST_PORT="$PORT" SX_PERSIST_DIR="$PDIR" \
   SX_ADMIN_USER="$USER" SX_ADMIN_PASSWORD="$PASS" SX_SESSION_SECRET="$SECRET" \
   bash lib/host/serve.sh >"$SERVE_LOG" 2>&1 &
 SVPID=$!