chore: improve actions performance and security practices (#5970)

* chore: bump actions and pin versions

* build: switch to blacksmith

* fix: use rust-toolchain stable

* build: improve pnpm store caching

* chore: remove emoji from workflows

* fix: run prepare job on blacksmith

* chore: kebab case id

* build: add concurrency groups to limit duplicate jobs

* build: switch around node setup and pnpm setup task

* chore: bump to nodejs 24, fix pnpm caching

* fix: enable corepack

* fix: concurrency deadlock in frontend preview

* fix: approve build scripts

* fix: just don't cancel concurrent previews

* build: remove pnpm setup action everywhere

* build: cache apt packages

* build: yet another attempt at fixing concurrency

* build: lower runner type for frontend deploy

* fix: eslint not existing

* build: add sccache to turbo-ci

* fix: correct nextest pkg

* fix: turbo ignoring sccache

* revert me: test labrinth tests

* Revert "revert me: test labrinth tests"

This reverts commit def5cc19183d5c0fe3b6f3c03635d73bb59bd312.

* build: compile app before docker build

* build: lower runner types

* build: remove docker inline caching

* build: try mold on labrinth

* build: tweak labrinth prod build profile

* fix: app windows builds and caching

* fix: tombi format cargo.toml

* fix: swap ping test to cubecraft to avoid CI flakiness

* typos fix

---------

Co-authored-by: aecsocket <aecsocket@tutanota.com>

Cargo.toml

@@ -279,10 +279,11 @@ opt-level = "s"  # Optimize for binary size
 strip = true  # Remove debug symbols
 lto = true  # Enables link to optimizations
 panic = "abort"  # Strip expensive panic clean-up logic
-codegen-units = 1  # Compile crates one after another so the compiler can optimize better
 
 # Specific profile for labrinth production builds
 [profile.release-labrinth]
 inherits = "release"
+opt-level = 2
 strip = false  # Keep debug symbols for Sentry
+lto = "thin"  # Enable LTO but keep compile times reasonable
 panic = "unwind"  # Don't exit the whole app on panic in production