A 5e storytelling engine with an LLM DM

Stamp auto-established stubs with a back reference to the transcript master

A stub entity page had no way to reach the scene that brought it into being. When a stub is auto-established this turn, the scanner now reads the campaign clock and appends a Mentions section to the stub, pointing at the game time the narration lands under and carrying a window of the surrounding narration with its wikilink delimiters stripped. The mention is stamped at the end of the turn, when the transcript records the narration, so the anchor points at where the text actually lives. Only a stub established this turn is stamped, and a stub already carrying a Mentions section is left alone, so a session that re-establishes a known name does not pile up duplicate pointers.