feat: support doris server specie

[Dragonliu2018]

Description

Apache Doris implements the MySQL wire protocol and hard-codes 5.7.99 as its handshake version string, making it indistinguishable from MySQL during connection. mycli previously identified Doris as MySQL with a blank version.

Fix: after every connection classified as MySQL, run a lightweight probe:

SELECT @@version_comment, @@version

If "doris" appears in either field (e.g. 'Doris version doris-2.1.7-rc01'), extract the real version number and update server_info toServerInfo(ServerSpecies.Doris, "2.1.7").

Before / After:

# Before
MySQL 
MySQL root@doris-host:(none)>

# After
Doris 2.1.7
Doris root@doris-host:(none)>

Checklist

• I added this contribution to the changelog.md file.
• I added my name to the AUTHORS file (or it's already there).
• To lint and format the code, I ran

  uv run ruff check && uv run ruff format && uv run mypy --install-types .

[rolandwalker]

It would be preferable if this was cast as a utility method which returned a value rather than setting self.server_info as a side effect. What do you think?

[Dragonliu2018]

Good point! Refactored it into _probe_doris_version() which returns str | None (the Doris version string, or None if not Doris). The caller now handles constructing the ServerInfo. Thanks!

[rolandwalker]

Hi! Thanks for the contributions. You can ignore the Codex failures. I need to update an API key.

In this PR, we could also update the list of supported servers in the README.

[Dragonliu2018]

Hi! Thanks for the contributions. You can ignore the Codex failures. I need to update an API key.

In this PR, we could also update the list of supported servers in the README.

Done! Updated README.md to include Apache Doris in the list of supported servers.

[rolandwalker]

Perfect!