chore(deps): bump uvicorn from 0.49.0 to 0.52.0 in /backend

[dependabot]

Bumps uvicorn from 0.49.0 to 0.52.0.

Release notes

Sourced from uvicorn's releases.

Version 0.52.0

This release adds an experimental HTTP/1.1 implementation backed by zttp, a sans-IO HTTP parser I've been developing on the side: a core written in Zig, with bindings to Python. It has been running under a fuzzer for some weeks now, and has been through multiple rounds of security auditing.

It is still experimental, so don't put it in front of production traffic yet. Try it with --http zttp, and please send any feedback to the issue tracker.

Added

• Add an experimental zttp HTTP/1.1 implementation, selectable with --http zttp (#2979)

Fixed

• Keep non-ASCII WebSocket request headers intact with websockets 17.0, which encodes them with ISO-8859-1 (#3036)

Full Changelog: Kludex/uvicorn@0.51.0...0.52.0

Version 0.51.0

What's Changed

• Restart workers with overlap on SIGHUP for near-zero-downtime reloads by @​Kludex in Kludex/uvicorn#3025
• Remove colorama from the standard extra by @​Kludex in Kludex/uvicorn#3027

Full Changelog: Kludex/uvicorn@0.50.2...0.51.0

Version 0.50.1

What's Changed

• Split comma-separated Sec-WebSocket-Protocol values in the websockets-sansio implementation by @​Aayush7352 in Kludex/uvicorn#3019

New Contributors

• @​Aayush7352 made their first contribution in Kludex/uvicorn#3019

Full Changelog: Kludex/uvicorn@0.50.0...0.50.1

Version 0.50.0

What's Changed

• Memoize trusted host checks to avoid re-parsing the client IP per request by @​Kludex in Kludex/uvicorn#2970
• Cache the asgi scope sub-dict per connection by @​Kludex in Kludex/uvicorn#2976
• Build a fresh asgi scope dict per request by @​Kludex in Kludex/uvicorn#2977
• Replace click.style with an internal ANSI style helper by @​Kludex in Kludex/uvicorn#2981
• Avoid copying single-frame WebSocket payloads in websockets-sansio by @​Kludex in Kludex/uvicorn#2983
• Deprecate the legacy websockets implementation and default auto to websockets-sansio by @​Kludex in Kludex/uvicorn#2985
• Exit with a dedicated code on startup failure and stop the supervisor when a worker can't boot by @​Kludex in Kludex/uvicorn#3001
• Skip the eager app import in the parent when spawning workers by @​Kludex in Kludex/uvicorn#3012

Full Changelog: Kludex/uvicorn@0.49.0...0.50.0

Changelog

Sourced from uvicorn's changelog.

0.52.0 (July 29, 2026)

This release adds an experimental HTTP/1.1 implementation backed by zttp, a sans-IO HTTP parser I've been developing on the side: a core written in Zig, with bindings to Python. It has been running under a fuzzer for some weeks now, and has been through multiple rounds of security auditing.

It is still experimental, so don't put it in front of production traffic yet. Try it with --http zttp, and please send any feedback to the issue tracker.

Added

• Add an experimental zttp HTTP/1.1 implementation, selectable with --http zttp (#2979)

Fixed

• Keep non-ASCII WebSocket request headers intact with websockets 17.0, which encodes them with ISO-8859-1 (#3036)

0.51.0 (July 8, 2026)

Added

• Restart workers one at a time on SIGHUP, bringing each replacement up before retiring the old worker, so reloads no longer drop requests (#3025)

Removed

• Remove colorama from the standard extra (#3027)

0.50.2 (July 6, 2026)

Fixed

• Require websockets>=13.0, which the default websockets-sansio implementation needs (#3021)

0.50.1 (July 6, 2026)

Fixed

• Split comma-separated Sec-WebSocket-Protocol values in the websockets-sansio implementation (#3019)

0.50.0 (July 4, 2026)

If you use WebSockets, note that --ws auto now picks the websockets-sansio implementation. You shouldn't need it, but you can pin --ws websockets to get the deprecated legacy one back.

Changed

• Exit with the dedicated code 3 on any startup failure: app loading, socket bind and lifespan startup errors previously exited with a mix of 0, 1 and 3 (#3001)
• Stop the multiprocess supervisor when a worker exits with code 3 instead of restarting it forever (#3001)
• Default --ws auto to websockets-sansio when websockets is installed (#2985)
• Skip the eager app import in the parent process with --reload or --workers, fixing a memory regression introduced in 0.47.0 (#3012)
• Build a fresh asgi scope dict per request (#2977)
• Cache the asgi scope sub-dict per connection (#2976)
• Avoid copying single-frame WebSocket payloads in websockets-sansio (#2983)
• Memoize trusted host checks in ProxyHeadersMiddleware (#2970)

... (truncated)

Commits

• 8f1b884 Version 0.52.0 (#3044)
• f6833db Add experimental zttp HTTP/1.1 protocol (#2979)
• d26c85c Prepare compatibility with websockets 17.0. (#3036)
• 7e11cc6 Clarify how limit_concurrency and backlog differ (#3029)
• e4d0b05 Version 0.51.0 (#3028)
• 944e43d Remove colorama from the standard extra (#3027)
• 2e78770 Restart workers with overlap on SIGHUP for near-zero-downtime reloads (#3025)
• a1b570c Version 0.50.2 (#3022)
• 83c7da7 Require websockets>=13.0 for the default sansio implementation (#3021)
• b4d0116 Version 0.50.1 (#3020)
• Additional commits viewable in compare view