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

server/src/chat/transport/matrix/bot/messages/handle_message.rs

@@ -54,6 +54,11 @@ pub(in crate::chat::transport::matrix::bot) async fn handle_message(
         prefix
     };
 
+    // Pull new pipeline-transition events from the CRDT event log for this
+    // session and atomically advance the high-water marks so the same events
+    // are not re-injected on the next turn.
+    let event_log_ctx = crate::llm_session::assemble_prompt_context(&room_id_str);
+
     // The prompt is just the current message with sender attribution.
     // Prior conversation context is carried by the Claude Code session.
     let bot_name = &ctx.services.bot_name;
@@ -64,7 +69,7 @@ pub(in crate::chat::transport::matrix::bot) async fn handle_message(
         String::new()
     };
     let prompt = format!(
-        "{system_reminder_prefix}[Your name is {bot_name}. Refer to yourself as {bot_name}, not Claude.]\n{active_project_ctx}\n{}",
+        "{system_reminder_prefix}{event_log_ctx}[Your name is {bot_name}. Refer to yourself as {bot_name}, not Claude.]\n{active_project_ctx}\n{}",
         format_user_prompt(&sender, &user_message)
     );