Bump uvicorn from 0.49.0 to 0.52.3 in /docker/fastapi

[dependabot]

Bumps uvicorn from 0.49.0 to 0.52.3.

Changelog

Sourced from uvicorn's changelog.

0.52.3 (August 13, 2026)

Changed

• Update zttp to 0.0.24 and use its combined receive path, improving HTTP/1.1 request parsing performance (#3067)

0.52.2 (August 13, 2026)

Fixed

• Update zttp to 0.0.22, fixing bodyless request receives and improving HTTP/1 request parsing performance (#3063)

0.52.1 (August 1, 2026)

Fixed

• Complete the closing handshake on server-initiated WebSocket closes in the websockets-sansio and wsproto implementations, waiting for the client's close reply with a 10 second timeout instead of resetting the connection (#3053)
• Add missing write flow control to the websockets-sansio implementation, preventing data truncation on server-initiated closes with large in-flight payloads (#3048)
• Handle connection loss while a WebSocket write is waiting on backpressure (#3050)
• Remove duplicate Content-Type and Content-Length headers from WebSocket denial responses on the websockets-sansio implementation, and deliver non-UTF-8 denial bodies intact (#3041)

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)

... (truncated)

Commits

• a68da60 Version 0.52.3 (#3068)
• 6e3bb4c Use zttp 0.0.24 fast receive path (#3067)
• 2a5ff18 Version 0.52.2 (#3066)
• 1920297 Update zttp to 0.0.22 (#3063)
• 5c560da chore(deps): bump pymdown-extensions from 11.0 to 11.0.1 (#3061)
• ee8e45c Version 0.52.1 (#3056)
• b57926d Remove duplicate content headers from WebSocket denial responses on websocket...
• 49de1b9 chore(deps): bump pymdown-extensions from 10.21.3 to 11.0 (#3042)
• 2f3fa3a Complete server-initiated closes in SansIO WebSocket protocols (#3053)
• 8c59d55 chore(deps): bump the github-actions group with 5 updates (#3054)
• Additional commits viewable in compare view

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[dependabot]

A newer version of uvicorn exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.