fix(deps): update python dependencies

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
authlib	1.6.1 -> 1.6.3
flask (changelog)	3.1.1 -> 3.1.2
gevent (changelog)	25.5.1 -> 25.8.2
python-keycloak (changelog)	5.8.0 -> 5.8.1

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Release Notes

authlib/authlib (authlib)

v1.6.3: Version 1.6.3

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What's Changed

• Add diff-cover check in GHA by @​azmeuk in #​803
• Run GHA unit tests with uv by @​azmeuk in #​805
• Move from pre-commit to prek by @​azmeuk in #​804
• Sign OIDC id_token according to id_token_signed_response_alg client metadata by @​azmeuk in #​802

Full Changelog: authlib/authlib@v1.6.2...v1.6.3

v1.6.2: Version 1.6.2

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What's Changed

• Allow insecure transport for 127.0.0.1 for debugging by @​geigerzaehler in #​788
• Raise a MissingCodeError when code parameter is missing by @​lepture in #​786
• Temporarily restore OAuth2Request body parameter by @​azmeuk in #​791
• Raise MissingCodeException when code parameter is missing by @​lepture in #​794
• Fix id_token generation with EdDSA alg by @​azmeuk in #​800

Full Changelog: authlib/authlib@v1.6.1...v1.6.2

pallets/flask (flask)

v3.1.2

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Released 2025-08-19

• stream_with_context does not fail inside async views. :issue:5774
• When using follow_redirects in the test client, the final state
  of session is correct. :issue:5786
• Relax type hint for passing bytes IO to send_file. :issue:5776

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