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>

cortex/session_logger.py

@@ -0,0 +1,22 @@
+from pathlib import Path
+from datetime import datetime
+from config import settings
+
+
+def log_turn(session_id: str, user_msg: str, assistant_msg: str) -> None:
+    today = datetime.now().strftime("%Y-%m-%d")
+    sessions_dir = settings.inara_path() / "sessions"
+    sessions_dir.mkdir(exist_ok=True)
+
+    log_file = sessions_dir / f"{today}.md"
+    timestamp = datetime.now().strftime("%H:%M")
+    is_new = not log_file.exists()
+
+    with open(log_file, "a") as f:
+        if is_new:
+            f.write(f"# Session Log — {today}\n")
+        f.write(
+            f"\n### [{timestamp}] `{session_id}`\n"
+            f"**Scott:** {user_msg}\n\n"
+            f"**Inara:** {assistant_msg}\n"
+        )