chore: release 2025.9.3

[mise-en-dev]

🚀 Features

• (backend) improve http error when platform url missing; list available platforms by @jdx in #6200

🐛 Bug Fixes

• (backend) preserve arch underscores in platform keys by @jdx in #6202
• (task) resolve hanging issue with multiple depends_post by @jdx in #6206
• couldn't download node binary in Alpine, even if it exists in the mirror url by @Hazer in #5972
• breaking use config_root for env._.path by @jdx in #6204
• bugfix for paths that include spaces by @karim-elkholy in #6210

📚 Documentation

• improve release notes generation by @jdx in #6197
• fix release changelog contributor reporting by @jdx in #6201

Chore

• use fine-grained gh token by @jdx in #6208
• use settings.local.json for claude config by @jdx in fd0fba9

New Contributors

• @karim-elkholy made their first contribution in #6210
• @Hazer made their first contribution in #5972

[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.2 x -- echo	20.1 ± 0.5	18.7	22.4	1.00
mise x -- echo	20.5 ± 0.4	19.2	21.5	1.02 ± 0.03

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.2 env	19.7 ± 0.6	18.8	28.7	1.00
mise env	19.8 ± 0.4	18.7	21.2	1.01 ± 0.04

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.2 hook-env	19.4 ± 0.4	18.4	20.6	1.00
mise hook-env	19.6 ± 0.5	18.4	22.8	1.01 ± 0.03

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.2 ls	17.5 ± 0.4	16.5	18.5	1.00
mise ls	18.0 ± 0.4	16.9	19.7	1.03 ± 0.03

xtasks/test/perf

Command	mise-2025.9.2	mise	Variance
install (cached)	171ms	✅ 107ms	+59%
ls (cached)	64ms	64ms	+0%
bin-paths (cached)	68ms	68ms	+0%
task-ls (cached)	513ms	510ms	+0%

✅ Performance improvement: install cached is 59%