feat(unit-tests): increase code coverage

This commit adds:
- Pull request template
- Unit tests for `DbCommandInterceptorProcessor` class
- Unit tests for `SecondLevelCacheInterceptor` class
- The task is to run unit tests after the build

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,35 @@
+# PR Checklist
+
+Please check if your PR fulfills the following requirements:
+
+- [ ] The commit message follows [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/)
+- [ ] Tests for the changes have been added (for bug fixes / features)
+- [ ] Docs have been added / updated (for bug fixes / features)
+
+## PR Type
+
+What kind of change does this PR introduce?
+
+<!-- Please check the one that applies to this PR using "x". -->
+
+- [ ] Bugfix
+- [ ] Feature
+- [ ] Refactoring (no functional changes, no api changes)
+- [ ] Other... Please describe:
+
+## What is the current behavior?
+
+<!-- Please describe the current behavior that you are modifying, or link to a relevant issue. -->
+
+Closes #
+
+## What is the new behavior?
+
+## Does this PR introduce a breaking change?
+
+- [ ] Yes
+- [ ] No
+
+<!-- If this PR contains a breaking change, please describe the impact and migration path for existing applications below. -->
+
+## Other information

.github/workflows/build.yml

@@ -16,6 +16,9 @@ jobs:
     - name: Build EFCoreSecondLevelCacheInterceptor lib
       run: dotnet build ./src/EFCoreSecondLevelCacheInterceptor/EFCoreSecondLevelCacheInterceptor.csproj --configuration Release
 
+    - name: Run EFCoreSecondLevelCacheInterceptor lib unit tests
+      run: dotnet test ./src/Tests/EFCoreSecondLevelCacheInterceptor.UnitTests/EFCoreSecondLevelCacheInterceptor.UnitTests.csproj --no-restore --logger "console;verbosity=detailed"
+
     - name: Push Package to NuGet.org
       if: github.event_name == 'push'
       run: dotnet nuget push **\*.nupkg -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json --skip-duplicate