feat: add repeated transient local option

[wep21]

Implement a feature equivalent to ros/ros_comm#1850

[MichaelOrlov]

@wep21 I am sorry I can't approve this feature.
This feature doesn't align with rosbag2 and entire DDS communication concept by design.

First of all in rosbag2 we don't have ability to start playback from some chunk or splitted bag. Instead we can start from some timepoint and have jump/seek API. We also have ability to pause playback and burst some messages without respecting delay between them i.e. "fast forward" or play_next API.
User can start playback, wait till key frames e.g. map or tf will be published then go in pause mode and quickly playback some amount of messages with play_next API or use seek(time) API to skip some amount of messages to be able to continue playback from some timepoint. There are no way to start playback or jump in playback to the next split file.

Therefore in rosbag2 we don't have such problem with missed messages publishing only once. It's just because rosbag2 designed differently.

Another aspect is DDS communication. With transient local qos settings could be and in many cases really are topics which are publishing on regular bases. Approach when saving all messages from such topics in hash map and then writing them to each new bag doesn't look like a good idea.

One more aspect is that in rosbag2 we are trying to adhere to determinism in recording and playback. Playback should exactly repeat flow from recording as close as possible.
It means there are must not be any extra magically added messages during playback or recording which was not really published when recording was happened.

[MichaelOrlov]

• Closing as will not be merged due to the conflict in design and concept of Rosbag2.