story-kit: merge 182_story_matrix_bot_conversation_context_and_multi_room

.story_kit/bot.toml.example

@@ -1,6 +1,15 @@
 homeserver = "https://matrix.example.com"
 username = "@botname:example.com"
 password = "your-bot-password"
-room_id = "!roomid:example.com"
+
+# List one or more rooms to listen in.  Use a single-element list for one room.
+room_ids = ["!roomid:example.com"]
+
+# Optional: the deprecated single-room key is still accepted for backwards compat.
+# room_id = "!roomid:example.com"
+
 allowed_users = ["@youruser:example.com"]
 enabled = false
+
+# Maximum conversation turns to remember per room (default: 20).
+# history_size = 20