Update dependency Werkzeug to v3.1.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
Werkzeug (changelog)	==3.1.8 → ==3.1.9

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Release Notes

pallets/werkzeug (Werkzeug)

v3.1.9

Compare Source

Released 2026-09-27

• safe_join on Windows does not allow special devices names with empty ADS
  markers on NTFS. :ghsa:g6x2-hccm-hh4m
• ProfilerMiddleware uses profiling.tracing on Python 3.15.
  :issue:3207
• uri_to_iri and iri_to_uri preserve empty username, password, and
  port 0. :issue:3189
• Improve performance of parse_options_header. :pr:3231
• Improve performance of parse_etags. :pr:3231
• Improve performance of parse_cookie. :pr:3231
• get_host also checks that the port is in the valid range. :pr:3236
• The int URL converter returns a 404 instead of 500 error when the value
  is longer than sys.get_int_max_str_digits(). :issue:3237
• Improve debugger PIN generation from cgroup data inside Podman.
  :issue:3245
• Authorization parsing basic auth disallows non-base64 characters.
  :pr:3248
• application/x-www-form-urlencoded form data is no longer limited to
  max_form_memory_size, only max_content_length. :pr:3251
• LimitedStream.readinto does not resize the buffer when it reads less
  than the remaining size. :pr:3253
• Rules with 10 or more converters in a single part assign matched values
  correctly. :pr:3254
• The invalid Range suffix length -0 is no longer accepted. :pr:3255

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[coveralls]

Coverage Report for CI Build 36885348540

Coverage remained the same at 91.609%

Details

• Coverage remained the same as the base build.
• Patch coverage: No coverable lines changed in this PR.
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	727
Covered Lines:	666
Line Coverage:	91.61%
Coverage Strength:	8.24 hits per line

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💛 - Coveralls