feat: thought loop reach-out (ntfy push) + external input feeds

Her remaining two wishes from the 6-19 sketch:

Proactive reach-out (#6, literal): lyra/notify.py pushes to ntfy so she can reach
Brian when he's not in the app. thoughts.maybe_ping gates on salience, a cooldown,
and local quiet hours (all config-tunable; eager defaults), uses ntfy JSON publish
(UTF-8 titles/messages), links to /thoughts, and marks the thread surfaced so chat
won't also re-raise it. Disabled unless NTFY_URL is set.

External input feed (#1): lyra/feeds.py pulls configurable RSS/Atom feeds (stdlib
ElementTree, no new dep; tolerant of RSS 2.0 + Atom), dedupes seen items in a
feed_items table, and hands think() one fresh item at a time. New 'react' mode:
a would-be new thread instead reacts to a world item (FEED_REACT_PROB). Dream
cycle refreshes feeds on its cadence; failures degrade to no item.

Config: NTFY_URL/NTFY_TOPIC/LYRA_WEB_URL, PING_SALIENCE/COOLDOWN/QUIET_HOURS,
LYRA_TIMEZONE, LYRA_FEEDS, FEED_REACT_PROB (+ .env.example). thought_meta table
for ping cooldown. 10 new tests (feeds parse, react mode, ping gating); suite 65.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test_dream.py

@@ -12,6 +12,7 @@ def lyra(tmp_path, monkeypatch):
     """A fresh Lyra wired to a temp DB with stubbed embeddings + LLM."""
     monkeypatch.setenv("LYRA_DB_PATH", str(tmp_path / "test.db"))
     monkeypatch.setenv("SUMMARY_BACKEND", "local")
+    monkeypatch.setenv("LYRA_FEEDS", "")  # dream cycle refreshes feeds; keep it offline
 
     from lyra import llm
     # Deterministic 3-d embeddings; content-insensitive is fine for storage tests.