Fix Docker Compose version field warning for Ubuntu compatibility

PROBLEM: Ubuntu users see "the attribute version is obsolete" warning
because Docker Compose v2+ deprecates the version field.

SOLUTION:
✅ Remove "version": "3.8" from all Docker Compose configurations
✅ Update test to expect no version field (Docker Compose v2+ standard)
✅ Maintains full compatibility with both Docker Compose v1 and v2+

RESULT: No more Docker Compose version warnings on modern systems.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: jsbattig

src/code_indexer/__init__.py

@@ -5,5 +5,5 @@
 to provide intelligent code search capabilities.
 """
 
-__version__ = "0.0.7.0"
+__version__ = "0.0.8.0"
 __author__ = "Code Indexer Team"

src/code_indexer/services/docker_manager.py

@@ -238,7 +238,6 @@ def create_compose_file(self, data_dir: Path = Path(".code-indexer")) -> None:
         qdrant_dockerfile = self._find_dockerfile("Dockerfile.qdrant")
 
         compose_config = {
-            "version": "3.8",
             "services": {
                 "ollama": {
                     "build": {
@@ -733,7 +732,6 @@ def generate_compose_config(
         # current_project_dir = Path.cwd()  # Currently unused but may be needed for future features
 
         compose_config = {
-            "version": "3.8",
             "services": {
                 "ollama": {
                     "build": {

tests/test_docker_manager.py

@@ -126,10 +126,10 @@ def test_compose_config_generation(self):
 
             config = docker_manager.generate_compose_config()
 
-            # Check basic structure
-            self.assertIn("version", config)
+            # Check basic structure (version field is deprecated in Docker Compose v2+)
             self.assertIn("services", config)
             self.assertIn("networks", config)
+            self.assertNotIn("version", config)  # Should not have version field
 
             # Check services
             services = config["services"]