Reorder shared D&D extraction prompt messages

internal/modules/dnd/shared/assets/prompts/common-dnd-identity.md

@@ -0,0 +1,7 @@
+Use the most specific supported in-world character or creature identity for
+each actor or participant. Do not identify a human player, transcript speaker,
+or the GM as an out-of-world person when an in-world identity is supported.
+
+Player, party, glossary, campaign, and NPC registry references may disambiguate
+an identity, but a reference alone cannot establish that the identity
+participated in the transcript.