feat(events): a param that holds several values (MODULE_API 1.14.0)

Rust PLAN_REDESIGNS §12.3 (D344): an event action param may declare
`multiple: true`, with an optional `max` (1-100, 20 when left out), on a
`string` or `int` param. The permission reward steps take several permissions
in one step through it.

- registries: the flag and `max` are checked at registration and served in the
  catalog; refused on other types, on a duration, on a template's inputs, and
  with a list as the example. A param that does not say it reads back exactly
  as declared, without the keys.
- spec: the value is a JSON array, each item the type's literal, duplicates
  dropped in order, at most `max`; a bare value is a list of one; `required`
  means at least one; an empty item is refused.
- authorize: a multiple param's example is priced as a list of one, since
  cost() is handed the array.
- editor: a multi-select. Chips above a grouped, filterable checklist for a
  source that answered; the typeahead for a searchable source; a tag box
  otherwise. Ticking past max is refused in words. A new step holds the
  example as a list of one.
- run console: params read as `name: value`, a list joined by commas.
- MODULE_API 1.13.0 -> 1.14.0 on both halves; engagement-triggers.json and the
  catalog's OpenAPI note regenerated.

Additive only: Module-uo (`^1.10.0`) declares no multiple param.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/src/events/authorize.js

@@ -144,7 +144,9 @@ function priceOf(action, params) {
 function dimensionsOf(action) {
   const params = {}
   for (const p of action?.params || []) {
-    if (p.example !== undefined && p.example !== null) params[p.name] = p.example
+    // A `multiple` param's example is one value and `cost()` is handed a list
+    // (1.14.0), so it is priced as a list of one.
+    if (p.example !== undefined && p.example !== null) params[p.name] = p.multiple ? [p.example] : p.example
   }
   const priced = priceOf(action, params)
   return priced ? Object.keys(priced).sort() : []