Support Python 3.14

[medaminezghal]

Description

I have searched across all dependencies and those the only ones that doesn't support it: pyyaml, asyncpg, duckdb, pandas, tiktoken and aiohttp.

May be this issue could be a roadmap for supporting it.

References

PyYAML Python 3.14 support
pandas Python 3.14 support
AIOHTTP Python 3.14 support
AIOHTTP Python 3.14 support

[Kludex]

I've created #2413, but it needs more work. If someone wants to grab it, feel free to, otherwise I'll wait till the official release.