ci: optimize CI workflow — shallow clone (fetch-depth: 1) + NuGet package caching for all jobs

Agent-Logs-Url: https://github.com/winnerspiros/osu/sessions/ef1cac07-0e5c-4e78-80ca-6affd0c0fd6b

Co-authored-by: winnerspiros <1675249+winnerspiros@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -17,13 +17,20 @@ jobs:
         uses: actions/checkout@v6
         with:
           submodules: recursive
-          fetch-depth: 0
+          fetch-depth: 1
 
       - name: Install .NET 10.0.x
         uses: actions/setup-dotnet@v5
         with:
           dotnet-version: "10.0.x"
 
+      - name: Cache NuGet packages
+        uses: actions/cache@v5
+        with:
+          path: ~/.nuget/packages
+          key: ${{ runner.os }}-nuget-${{ hashFiles('**/*.csproj', '**/*.props') }}
+          restore-keys: ${{ runner.os }}-nuget-
+
       - name: Restore Tools
         run: dotnet tool restore
 
@@ -87,13 +94,20 @@ jobs:
         uses: actions/checkout@v6
         with:
           submodules: recursive
-          fetch-depth: 0
+          fetch-depth: 1
 
       - name: Install .NET 10.0.x
         uses: actions/setup-dotnet@v5
         with:
           dotnet-version: "10.0.x"
 
+      - name: Cache NuGet packages
+        uses: actions/cache@v5
+        with:
+          path: ~/.nuget/packages
+          key: ${{ runner.os }}-nuget-${{ hashFiles('**/*.csproj', '**/*.props') }}
+          restore-keys: ${{ runner.os }}-nuget-
+
       - name: Compile
         run: dotnet build -c Debug -warnaserror osu.Desktop.slnf
 
@@ -158,7 +172,7 @@ jobs:
         uses: actions/checkout@v6
         with:
           submodules: recursive
-          fetch-depth: 0
+          fetch-depth: 1
 
       - name: Setup JDK 11
         uses: actions/setup-java@v5
@@ -171,6 +185,13 @@ jobs:
         with:
           dotnet-version: "10.0.x"
 
+      - name: Cache NuGet packages
+        uses: actions/cache@v5
+        with:
+          path: ~/.nuget/packages
+          key: ${{ runner.os }}-nuget-${{ hashFiles('**/*.csproj', '**/*.props') }}
+          restore-keys: ${{ runner.os }}-nuget-
+
       - name: Install .NET workloads
         run: dotnet workload install android
 
@@ -186,12 +207,20 @@ jobs:
         uses: actions/checkout@v6
         with:
           submodules: recursive
-          fetch-depth: 0
+          fetch-depth: 1
 
       - name: Install .NET 10.0.x
         uses: actions/setup-dotnet@v5
         with:
           dotnet-version: "10.0.x"
+
+      - name: Cache NuGet packages
+        uses: actions/cache@v5
+        with:
+          path: ~/.nuget/packages
+          key: ${{ runner.os }}-nuget-${{ hashFiles('**/*.csproj', '**/*.props') }}
+          restore-keys: ${{ runner.os }}-nuget-
+
       - name: Set Xcode version
         run: sudo xcode-select -s /Applications/Xcode_26.3.app