chore: update golangci-lint configuration and improve CI workflow documentation

- Increased thresholds for funlen and lll linters to accommodate complex functions.
- Added exclusions for dupl linter in specific files and directories to reduce false positives.
- Updated CI workflow documentation to clarify triggers and requirements for SonarCloud analysis.
- Removed unnecessary linter directives in several files for improved readability.

.github/workflows/ci.yml

@@ -2,9 +2,10 @@ name: CI
 
 on:
   push:
-    branches: [master, main, develop]
+    branches: [master, main]
   pull_request:
-    branches: [master, main, develop]
+    branches: [master, main]
+    types: [opened, synchronize, reopened]
 
 permissions:
   contents: read
@@ -12,7 +13,7 @@ permissions:
   pull-requests: write
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 env:
@@ -138,14 +139,18 @@ jobs:
           files: ./coverage.out
           flags: unittests
           name: codecov-onvif-go
-          fail_ci_if_error: true
+          # Don't fail on PRs from forks where token may not be available
+          fail_ci_if_error: ${{ github.event_name == 'push' }}
           verbose: true
 
   # Stage 4: SonarCloud Analysis (depends on test)
+  # Only runs on push to master/main when SONAR_TOKEN is available
+  # Skipped for PRs from forks where secrets are not accessible
   sonarcloud:
     name: SonarCloud Analysis
     runs-on: ubuntu-latest
     needs: test
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/master' || github.ref == 'refs/heads/main') && github.repository == '0x524a/onvif-go'
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -235,10 +240,14 @@ jobs:
             echo "❌ Tests failed"
             exit 1
           fi
-          if [[ "${{ needs.sonarcloud.result }}" != "success" ]]; then
+          # SonarCloud is optional - only fails if it ran and failed (not if skipped)
+          if [[ "${{ needs.sonarcloud.result }}" == "failure" ]]; then
             echo "❌ SonarCloud analysis failed"
             exit 1
           fi
+          if [[ "${{ needs.sonarcloud.result }}" == "skipped" ]]; then
+            echo "ℹ️ SonarCloud analysis skipped (only runs on push to master/main)"
+          fi
           if [[ "${{ needs.build.result }}" != "success" ]]; then
             echo "❌ Build verification failed"
             exit 1