docs: bootstrap project instructions and roadmap

Add CLAUDE.md with authoritative stack (FastAPI + Jinja2 + SQLite),
deployment topology (CF-proxied -> OPNsense -> Caddy -> VM),
security must-haves, magic-link auth, and project git flow.

Add docs/ROADMAP.md with phased build plan, dataclasses, SQL schema,
caching strategy, visual design tokens (light-blue farm palette),
and .env contract.

Commit generic code_guidelines.md and security.md, note FastAPI
per-project override. Add docs/README.md. Commit logo assets and
.gitignore (venv, .env, data/, SQLite, caches).

No app code in this pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,42 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.egg-info/
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+
+# Virtual environments
+venv/
+.venv/
+env/
+
+# Secrets / local config
+.env
+.env.*
+!.env.example
+
+# SQLite runtime
+*.sqlite
+*.sqlite3
+*.db
+*.db-journal
+*.db-wal
+*.db-shm
+
+# Runtime data (DB + media uploads live here in prod)
+data/
+!data/.gitkeep
+
+# Editors / IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+.DS_Store
+
+# Build / Docker
+build/
+dist/
+*.log