initial commit — cassandra v0.1

Containerised macro-strategy dashboard: 4-panel web UI (indicators,
portfolio, flash news, AI strategic log), MariaDB store, hourly
ingestion jobs, OpenRouter-backed AI analysis.

Ports the four prototype scripts in the parent dir (market_pulse,
flash_news, trading212, strategic_log) into async services backed by a
persistent DB and served via FastAPI + Jinja2 + HTMX. APScheduler runs
as a separate compose service for crash-safety and easier restarts.

Portfolio composition + position names come live from Trading 212;
news per-ticker headlines reuse those names. Tone (NOVICE/INTERMEDIATE/
PRO) and analysis style (DRY/SPECULATIVE) are env-configurable and
stored on each log row so historical entries show what produced them.

Default model is deepseek/deepseek-v4-flash (overridable via env).
Light/dark theme toggle, sans-serif for prose surfaces, monospace for
data. Bearer-token auth, OpenRouter monthly cost cap, RSS feeds auto-
disabled on consecutive failures.

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

tests/fixtures/rss_sample.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0">
+  <channel>
+    <title>Sample</title>
+    <item>
+      <title>Brent crude jumps on Hormuz uncertainty</title>
+      <link>https://example.com/a</link>
+      <pubDate>Fri, 15 May 2026 12:00:00 GMT</pubDate>
+    </item>
+    <item>
+      <title>Fed signals caution as inflation re-accelerates</title>
+      <link>https://example.com/b</link>
+      <pubDate>Fri, 15 May 2026 13:30:00 GMT</pubDate>
+    </item>
+    <item>
+      <title></title>
+      <link>https://example.com/empty</link>
+      <pubDate>Fri, 15 May 2026 14:00:00 GMT</pubDate>
+    </item>
+  </channel>
+</rss>