huskies: merge 1125 story LLM session entity + assemble_prompt_context helper, wired into Matrix bot

server/src/main.rs

@@ -28,6 +28,8 @@ mod gateway_relay;
 mod http;
 mod io;
 mod llm;
+/// LLM session management — CRDT-backed context assembly for bot prompts.
+pub(crate) mod llm_session;
 /// Log buffer — in-memory ring buffer for recent server-side log lines.
 pub mod log_buffer;
 /// Mesh — peer discovery and multi-hop CRDT replication over WebSocket.