ci: ускорить линтер кешированием и меньшим числом запросов

.github/workflows/workflow.yml

@@ -35,7 +35,8 @@ jobs:
       - name: Set up JDK
         uses: ./.github/actions/setup-jdk
       - name: Check formatting
-        run: mvn -B spotless:check --file pom.xml
+        # -nsu безопасен: SNAPSHOT-зависимостей нет.
+        run: mvn -B -nsu spotless:check --file pom.xml
 
   lint:
     needs: build
@@ -46,8 +47,16 @@ jobs:
       - uses: actions/checkout@v7
       - name: Set up JDK
         uses: ./.github/actions/setup-jdk
+      - name: Restore checkstyle cache
+        uses: actions/cache@v5
+        with:
+          # Путь совпадает с cacheFile в pom.xml.
+          path: target/checkstyle-cachefile
+          key: checkstyle-${{ hashFiles('checkstyle.xml', 'pom.xml') }}
+          restore-keys: checkstyle-
       - name: Check lint
-        run: mvn -B checkstyle:check --file pom.xml
+        # -nsu безопасен: SNAPSHOT-зависимостей нет.
+        run: mvn -B -nsu checkstyle:check --file pom.xml
 
   junit:
     needs: build

.mvn/maven.config

@@ -0,0 +1 @@
+--no-transfer-progress

pom.xml

@@ -212,6 +212,7 @@
                     <configLocation>checkstyle.xml</configLocation>
                     <consoleOutput>true</consoleOutput>
                     <failOnViolation>true</failOnViolation>
+                    <cacheFile>${project.build.directory}/checkstyle-cachefile</cacheFile>
                 </configuration>
                 <executions>
                     <execution>