Initial commit — Cortex API + Inara identity

Cortex: FastAPI backend serving Inara via Claude/Gemini CLI backends.
Includes SSE streaming chat, session persistence, Google Chat webhook
handler, and Docker support.

Inara: Identity files (persona, soul, protocols, memory, context tiers)
mounted read-only into the container at runtime.

Features in initial cut:
- /chat endpoint with SSE keepalive + LLM fallback
- Session store with rolling history window
- Markdown rendering, copy-to-clipboard, links open in new tab
- Stacked right-column input controls (height selector, enter toggle,
  note mode with public/private) — semi-hidden until textarea grows
- /note endpoint for injecting public context into session history
- Docker Compose config (local dev runs natively; Docker for server)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,21 @@
+# Environments
+.venv/
+__pycache__/
+*.pyc
+
+# Secrets — keep .env.example, never commit real .env
+.env
+
+# Session data (runtime state, not source)
+cortex/data/
+
+# Syncthing Metadata
+.stfolder/
+
+# Temporary Files
+tmp/
+*.tmp
+*.log
+
+# System Files
+.DS_Store