rust: default next channel id is inconsistent with other languages

[YXL76]

Description

mcap/rust/src/write.rs

Line 239 in 4fcdd33

let next_channel_id = self.channels.len() as u16;

mcap/cpp/mcap/include/mcap/writer.inl

Lines 493 to 496 in 4fcdd33

	void McapWriter::addChannel(Channel& channel) {
	channel.id = uint16_t(channels_.size() + 1);
	channels_.push_back(channel);
	}

mcap/python/mcap/mcap/writer.py

Line 359 in 4fcdd33

channel_id = len(self.__channels) + 1

[linear]

FG-8576 rust: default next channel id is inconsistent with other languages

[jtbandes]

Hi there,
In the future, please follow the issue template when filing issues.

Could you describe why this is causing a problem for you? The MCAP spec does not dictate what the default channel id should be.

[defunctzombie]

Closing for no response. If there's more detail you can provide we are happy to revisit when you do.