fix: Address Gemini Code Assist review feedback

- Repository URL consistency: Updated all references to BeehiveInnovations/zen-mcp-server format
- Documentation clarity: Fixed misleading table headers and improved Docker configuration examples
- File conventions: Added missing final newlines to all files
- Configuration consistency: Clarified API key placeholder format in documentation

Addresses all points raised in PR #17 review by Gemini Code Assist.

🤖 Generated with Claude Code

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

.github/workflows/docker-test.yml

@@ -28,4 +28,5 @@ jobs:
       run: |
         echo "### ✅ Docker Build Test Passed" >> $GITHUB_STEP_SUMMARY
         echo "" >> $GITHUB_STEP_SUMMARY
-        echo "Docker image builds successfully and is ready for production." >> $GITHUB_STEP_SUMMARY
+        echo "Docker image builds successfully and is ready for production." >> $GITHUB_STEP_SUMMARY
+