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>

docs/README.md

@@ -0,0 +1,27 @@
+# Documentation Folder
+
+This folder contains business planning, architecture decisions, and documentation.
+
+**No application code belongs here.**
+
+## Contents
+
+| Document | Purpose |
+|----------|---------|
+| `ROADMAP.md` | Phased build plan, data model (dataclasses), SQL schema, visual design, env-var contract |
+| `MANUAL_TESTING.md` *(added in Phase 1)* | Manual test checklist for the public site + admin |
+
+## Related Docs (in repo root)
+
+| Document | Purpose |
+|----------|---------|
+| `../CLAUDE.md` | Project instructions — stack, topology, security must-haves, git flow |
+| `../code_guidelines.md` | Generic Python coding standards (FastAPI overrides its Flask default for this project) |
+| `../security.md` | Python security baseline (OWASP-aligned) |
+
+## Guidelines
+
+- Keep documents focused and concise.
+- Update docs when architecture decisions change.
+- Use markdown tables for structured information.
+- Link to external documentation where relevant.