Read GEMMA_SERVER env var; log it in __main__ block

Fix NameError: WEIGHTS_PATH -> ADAPTER_DIR in __main__ block

Upload app.py with huggingface_hub

fix: decouple Modal, strategy cache, duel lifecycle, health ready

fix: add .gitattributes for binary files, Dockerfile --chown for weights

fix: add .gitattributes to prevent binary file corruption on Windows

feat: hybrid two-tier architecture - Tiny Fighter (142k CPU) + Nemotron (Modal)