fix: pin uv version and add caching to CI workflows (#424)

## What

Pin uv to version 0.10.9 with caching enabled across all setup-uv action
usages in CI workflows. Add concurrency groups to CI and linter workflows
to cancel in-progress runs on new pushes.

## Why

Unpinned uv versions can cause unexpected CI breakage when new releases
introduce breaking changes. Caching speeds up workflow runs. Concurrency
cancellation avoids wasting CI resources on outdated pushes.

## Notes

- Mirrors changes from github-community-projects/evergreen#496
- The concurrency block only applies to CI and linter workflows, not to
  copilot-setup-steps or update-uv-lock workflows

Signed-off-by: jmeridth <jmeridth@gmail.com>

Author: jmeridth

.github/workflows/copilot-setup-steps.yml

@@ -33,6 +33,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@5a095e7a2014a4212f075830d4f7277575a9d098 # v7.3.1
         with:
+          version: "0.10.9"
           enable-cache: true
 
       - name: Set up Python

.github/workflows/python-ci.yml

@@ -10,6 +10,10 @@ on:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 
@@ -26,6 +30,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@5a095e7a2014a4212f075830d4f7277575a9d098 # v7.3.1
         with:
+          version: "0.10.9"
           enable-cache: true
       - name: Set up Python ${{ matrix.python-version }}
         run: uv python install ${{ matrix.python-version }}

.github/workflows/super-linter.yaml

@@ -5,6 +5,10 @@ on:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 
@@ -25,6 +29,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@5a095e7a2014a4212f075830d4f7277575a9d098 # v7.3.1
         with:
+          version: "0.10.9"
           enable-cache: true
       - name: Install dependencies
         run: uv sync --frozen

.github/workflows/update-uv-lock.yml

@@ -29,6 +29,9 @@ jobs:
 
       - name: Install uv
         uses: astral-sh/setup-uv@5a095e7a2014a4212f075830d4f7277575a9d098 # v7.3.1
+        with:
+          version: "0.10.9"
+          enable-cache: true
 
       - name: Update uv.lock
         run: uv lock