Add D&D location occurrence extractor

internal/modules/dnd/extract/locationoccurrences/assets/prompts/instructions.md

@@ -0,0 +1,8 @@
+Return the occurrences array even when no occurrence is established. Every
+record must contain location_id, name, kind, and source_refs. Copy location_id
+and name from one supplied registry record, and cite only narrow transcript
+ranges that support both that location and its classified occurrence.
+
+Do not summarize location descriptions, infer a missing registry record, or
+use registry context as evidence. Omit source_id; Notarius assigns the current
+transcript source identity.