data(schema): raise monologue line maxLength from 160 to 256 chars

Hard cap at 256 with soft guidance to aim for ≤160 to avoid line wrap.
Allows longer lines for urgent monologue and confrontation beats that
need more space without schema validation failures.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

content/_schema/monologue-pool.schema.json

@@ -37,8 +37,8 @@
         "text": {
           "type": "string",
           "minLength": 1,
-          "maxLength": 160,
+          "maxLength": 256,
-          "description": "Line text — 160 char max to fit monologue display without scrolling."
+          "description": "Line text — 256 char hard cap, aim for ≤160 to avoid line wrap"
         },
         "role": {
           "type": "string",