[BUG] Plugin backends lost http.server in v3.2.9

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Bug Report Description

Since v3.2.9, a plugin backend that does import http.server dies at import with ModuleNotFoundError: No module named 'http.server'.

It worked on v3.2.8. My plugin imports it at the top of one module, so the whole thing failed to load — every unrelated feature gone over a module only the file-transfer part needs.

fileserver.py, line 49, in <module> from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer ModuleNotFoundError: No module named 'http.server'

I compared the two released PluginLoader binaries: v3.2.8 bundles 642 Python modules, v3.2.9 bundles 398. The 258 that went are mostly distutils, _distutils_hack and setuptools' internals, along with http.server, socketserver, pydoc, cgi and configparser. That lines up with setuptools going 78.1.1 → 84.0.0 in this release, which dropped the bundled distutils shim — and that shim was what had been pulling those stdlib modules into the build.

I've worked around it by rebuilding the part I need on socket and threading. But any plugin serving HTTP locally will hit this, and the next dependency bump can quietly remove something else.

It would be nice if you: a) add http.server (and whatever else plugins commonly use) to hiddenimports in backend/pyinstaller.spec, or b) document which parts of the standard library a plugin backend can rely on, so plugin authors know what they can count on

I can send a PR for the first if you need to

Expected Behaviour

Decky plugins can use http.server correctly.

SteamOS version

3.8.16 Stable

Selected Update Channel

Stable

Decky Loader Version

3.2.9

Plugin Info

controller-tools 2.0.2 decky-undervolt 1.0.8 tabmaster 2.15.1 unifideck-decky 0.7.2 decky-game-settings 1.2.6 decky-lsfg-vk 0.12.2 decky-steamgriddb 1.7.1 deckyemu 0.14.0 hltb-for-deck 2.0.9

Have you modified the read-only filesystem at any point?

No response

Backend Logs

deckylog.txt

Frontend Logs

cef_log.txt

cef_log.previous.txt