Prepare for public git: .gitignore, .env, sanitized configs

- Add .gitignore excluding .env, __pycache__, test_files (copyrighted PDFs),
  session logs, marker/ submodule, and other generated/private files
- Add .env with local config (gitignored); expand .env.example with all
  supported environment variables
- docker-compose.yml: all hardcoded values now use default pattern
- Containerfile: install marker-pdf from GitHub instead of local submodule;
  fix AMD_COMPUTE default to false; sanitize default OLLAMA_HOST
- Remove marker/ submodule from git tracking (keep local checkout via .gitignore)
- Remove session transcript and copyrighted ENISA PDFs from git tracking
- Sanitize local IPs in README, kubernetes deployment, deploy-podman.sh
- Fix hardcoded paths in convert_both.py and compare_conversions.py
- Update requirements.txt to reference GitHub instead of local --editable

README.md

@@ -34,7 +34,7 @@ PORT=8000 python /app/marker-api/app.py
 
 ```bash
 curl http://localhost:8000/health
-# {"status":"ok","ollama":"http://10.0.1.127:11434","torch_device":"cuda","supported_formats":["docx","epub","html","jpg",...]}
+# {"status":"ok","ollama":"http://localhost:11434","torch_device":"cpu","supported_formats":["docx","epub","html","jpg",...]}
 ```
 
 ---
@@ -119,7 +119,7 @@ PDF, DOCX, XLSX, PPTX, EPUB, PNG, JPG, BMP, GIF, TIFF, WEBP, HEIC, HTML, HTM.
 
 | Variable | Default | Description |
 |----------|---------|-------------|
-| `OLLAMA_HOST` | `http://10.0.1.127:11434` | Ollama instance for OCR fallback / LLM |
+| `OLLAMA_HOST` | `http://localhost:11434` | Ollama instance for OCR fallback / LLM |
 | `DEESEEK_OCR_MODEL` | `deepseek-ocr` | OCR model name in Ollama |
 | `AMD_COMPUTE` | `false` | Enable AMD ROCm GPU support |
 | `TORCH_DEVICE` | auto | PyTorch device: `rocm`, `cuda`, `cpu` |