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>

.env.example

@@ -26,3 +26,17 @@ LYRA_DB_PATH=data/lyra.db
 # Optional: run embeddings on a separate always-on Ollama (decoupled from
 # LOCAL_BASE_URL, which serves local chat). Defaults to LOCAL_BASE_URL if unset.
 # EMBED_BASE_URL=http://127.0.0.1:11434
+
+# --- Thought-loop reach-out (ntfy push) ---
+# Leave NTFY_URL empty to disable proactive pings entirely.
+NTFY_URL=
+NTFY_TOPIC=lyra
+LYRA_WEB_URL=
+PING_SALIENCE=0.7        # min thought salience to push (eager)
+PING_COOLDOWN_MIN=0      # min minutes between pushes (0 = none)
+PING_QUIET_HOURS=1-9     # local hours to stay silent
+LYRA_TIMEZONE=America/New_York
+
+# --- External input feeds (RSS/Atom, comma-separated) ---
+LYRA_FEEDS=https://hnrss.org/frontpage,https://www.pokernews.com/rss.php
+FEED_REACT_PROB=0.5      # chance a new thought reacts to a feed item