fix: improve macOS deployment compatibility and Docker build hygiene

- .gitignore: add missing macOS artifacts (.AppleDouble, .Spotlight-V100, etc.)
- Makefile: fix `make ip` to detect network interfaces on both macOS and Linux
  (adds `ip` command fallback, guards macOS-only `ipconfig` behind uname check)
- Makefile: add `make install-creative` target with Apple Silicon Metal guidance
- Dockerfile: install deps from pyproject.toml instead of duplicating the list,
  eliminating drift between Dockerfile and pyproject.toml
- docker-compose.yml: document data/ directory prerequisite for bind-mount volume

https://claude.ai/code/session_01A81E5HMxZEPxzv2acNo35u

docker-compose.yml

@@ -93,6 +93,9 @@ services:
     restart: unless-stopped
 
 # ── Shared volume ─────────────────────────────────────────────────────────────
+# NOTE: the data/ directory must exist before running docker compose up.
+# `make docker-up` and `make up` handle this automatically.
+# If running docker compose directly, first run: mkdir -p data
 volumes:
   timmy-data:
     driver: local