feat: optimize PR Docker build to only run for relevant changes

- Add path filters to only trigger Docker builds for Python/Docker-related changes
- Includes: **.py, requirements*.txt, pyproject.toml, Dockerfile, docker-compose.yml, .dockerignore
- Avoids unnecessary builds for documentation-only or workflow-only PRs
- Saves CI resources and avoids permission issues for irrelevant changes

.github/workflows/auto-version.yml

@@ -3,6 +3,15 @@ name: PR Docker Build
 on:
   pull_request:
     types: [opened, synchronize, reopened]
+    paths:
+      - '**.py'
+      - 'requirements*.txt'
+      - 'pyproject.toml'
+      - 'Dockerfile'
+      - 'docker-compose.yml'
+      - '.dockerignore'
+      - 'server.py'
+      - 'config.py'
 
 permissions:
   contents: read