ci(checks): fix arm64 CI by switching sccache to ubi backend

The aqua backend for sccache does not support linux/arm64 despite
arm64 binaries being available on GitHub releases. Switch to the ubi
backend which downloads directly from GitHub releases and correctly
resolves the architecture.

Also add mise install steps to checks workflow to ensure tools are
available when the CI image may not have them pre-installed.

Author: drew

.github/workflows/checks.yml

@@ -31,6 +31,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install tools
+        run: mise install
+
       - name: Cache Rust target and registry
         uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
         with:
@@ -68,6 +71,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install tools
+        run: mise install
+
       - name: Install dependencies
         run: uv sync --frozen
 

mise.toml

@@ -15,7 +15,7 @@ kubectl = "1.35.1"
 uv = "0.10.2"
 protoc = "29.6"
 helm = "4.1.1"
-sccache = "0.14.0"
+"ubi:mozilla/sccache" = "0.14.0"
 
 [env]
 _.path = ["{{config_root}}/scripts/bin"]