Define D&D prompt transcript scopes

assets/dnd/shared/prompts/common-dnd-extraction-evidence.md

@@ -1,14 +1,7 @@
 Transcript units are the only evidence for extracted events and factual claims.
-Campaign and registry references may disambiguate names, aliases, speakers, or
-other identities, but they do not establish events, participation, effects, or
-source evidence.
-
 Every reported factual claim must be supported by cited transcript units. Use
 integer `start_unit_id` and `end_unit_id` values from the transcript. Omit
 `source_id`; Notarius assigns the current source identity.
 
 When supporting evidence is non-contiguous, use multiple narrow ranges rather
 than a broad range that bridges unrelated conversation.
-
-Return exactly one JSON object and no explanatory text. Output only the
-configured JSON object and fields defined by its response schema.